23 skidoo (sometimes 23 skiddoo) is an American slang phrase generally referring to leaving quickly, being forced to leave quickly by someone else, or taking advantage of a propitious opportunity to leave. Popularized during the early 20th century, the exact origin of the phrase is uncertain.
23 skidoo has been described as "perhaps the first truly national fad expression and one of the most popular fad expressions to appear in the U.S", to the extent that "Pennants and arm-bands at shore resorts, parks, and county fairs bore either  or the word 'Skiddoo'."
"23 skidoo" combines two earlier expressions, "twenty-three" (1899) and "skidoo" (1901), both of which, independently and separately, referred to leaving, being kicked out, or the end of something. "23 skidoo" quickly became a popular catchphrase after its appearance in early 1906.
Although there are a number of stories suggesting the possible origin of the phrase, none has been universally accepted.
Perhaps the most widely known story of the origin of the expression concerns the area around the triangular-shaped Flatiron Building at Madison Square in New York City. The building is located on 23rd Street at the intersection of Fifth Avenue and Broadway, the latter two of which intersect at an acute angle. Because of the shape of the building, winds swirl around it. During the early 1900s, groups of men reportedly gathered to watch women walking by have their skirts blown up, revealing legs, which were seldom seen publicly at that time. Local constables, when sometimes telling such groups of men to leave the area, were said to be "giving them the 23 Skidoo". An early nickelodeon film, What Happened on Twenty-third Street, which dates from 1901, shows a woman's skirt being lifted by the updraft from a ventilation grate, exposing her knees.
Some consider the Flatiron Building origin claim dubious because the slang expressions "23" and "skidoo" were already in use before 1902, the year in which the Flatiron Building was built.
"23" (or "Twenty-Three")
The earliest-known report of the slang expression "23" (or "twenty-three") as a code word for asking someone to leave is a newspaper reference on March 17, 1899:
For some time past there has been going the rounds of the men about town the slang phrase "Twenty-three." The meaning attached to it is to "move on," "get out," "good-bye, glad you are gone," "your move" and so on. To the initiated it is used with effect in a jocular manner.
It has only significance to local men and is not in vogue elsewhere. Such expressions often obtain a national use, as instanced by "rats!" "cheese it," etc., which were once in use throughout the length and breadth of the land.
Such phrases originated, no one can say when. It is ventured that this expression originated with Charles Dickens in the Tale of Two Cities. Though the significance is distorted from its first use, it may be traced. The phrase "Twenty-three" is in a sentence in the close of that powerful novel. Sidney Carton, the hero of the novel, goes to the guillotine in place of Charles Darnay, the husband of the woman he loves. The time is during the French Revolution when prisoners were guillotined by the hundred. The prisoners are beheaded according to their number. Twenty-two has gone and Sidney Carton answers to – Twenty-three. His career is ended and he passes from view.
At the time, a stage version of A Tale of Two Cities, The Only Way, was playing in London. The production moved to New York City later that year; it opened at the Herald Square Theatre on September 16, 1899. Less than two months later, popular slang author George Ade described having heard a new slang expression, "twenty-three":
By the way, I have come upon a new piece of slang within the past two months and it has puzzled me. I just heard it from a big newsboy who had a ‘stand’ on a corner. A small boy with several papers under his arm had edged up until he was trespassing on the territory of the other. When the big boy saw the small one he went at him in a threatening manner and said: ‘Here! Here! Twenty-three! Twenty-three!’ The small boy scowled and talked under his breath, but he moved away. A few days after that I saw a street beggar approach a well-dressed man, who might have been a bookmaker or horseman, and try for the usual ‘touch’. The man looked at the beggar in cold disgust and said: ‘Aw, twenty-three!’ I could see that the beggar didn’t understand it any better than I did. I happened to meet a man who tries to ‘keep up’ on slang and I asked [about] the meaning of ‘Twenty-three!’ He said it was a signal to clear out, run, get away.
In the same interview, Ade described two purported origin stories he had heard: that it was "from the English race tracks, twenty-three being the limit on the number of horses allowed to start in one race" or that it had been a signal used in a plot to free a Mexican embezzler from custody in New Orleans.
The word skidoo, used by itself as a noun denoting a supposed bringer of bad luck, is attested in the early 1910s, in P. G. Wodehouse's Psmith, Journalist. It appeared in newspapers as early as 1906.
Both of the slang expressions, 23 and skidoo, were used in George M. Cohan's 1904 musical play Little Johnny Jones. Numerous news items from the period credited either Cohan or Tom Lewis (the actor performing the role that spoke those lines in the play) with creating or popularizing one or both of the expressions. Even before the expression "23, skidoo!" became popular in its own right, 23 (or twenty-three) and skidoo were frequently used in conjunction with, or near, one another in the same sentence or paragraph; 23 often as part of the phrase "23 for you [or yours]." For example, "Skiddoo! Git! Twenty-three for yours!", or "Twenty-three for his! Skidoo."
The earliest known use of the expression, in the familiar "23, skidoo!" form, is an advertisement for Billy B. Van's show The Errand Boy:
Billy B. Van's Great Hit, in "The Errand Boy." 23--Skiddoo!! by Miller and Boecher.
The phrase quickly became a ubiquitous catchphrase, and Google Books has many examples of commercial advertisements using "23-Skidoo" that begin in 1906. For example, the edition of The Shoe Retailer for August 4, 1906, volume 59, No. 5 (Boston, MA), has a full-page ad for a "23-Skidoo" sale, with blurbs such as "23-Skidoo/Says Low Price to the Shoe/Now It's Up to You".
- Cartoonist "TAD" (Thomas A. Dorgan) was credited in his 1929 obituary in The New York Times as being the "First to say 'Twenty-three, Skidoo.'" 
- Baseball player Mike Donlin and comedian Tom Lewis may have created the expression as part of their vaudeville act.
- An article in the June 26, 1906 New York American credits the phrase to one Patsey Marlson, then a former jockey hauled into court on a misdemeanor charge. At his hearing, Marlson is asked by the judge how the expression came about. He explains that when he was a jockey, he worked at a track which only had room for 22 horses to start in a line. If a 23rd horse was added, the long shot would be lined up behind the 22 horses on the front line. Apparently, "23 skidoo" implied that if the horse in the back was to have any chance of winning, it would really have to run very fast. Marlson also says in the article that the expression was originally "23, skidoo for you."
- A parody of Henry Miller's well-regarded stage presentation of Charles Dickens's novel A Tale of Two Cities may have also been the beginning of the phrase. Miller's 1899 production, entitled The Only Way, was staged at the Herald Square Theatre. The final scene of the play portrays a series of executions at a guillotine. As each person is beheaded, an old woman counts. When Sydney Carton, the protagonist of the story, is beheaded, the old woman calls out "Twenty-three!" The grisly scene was remarkable for its time, but it soon became the subject for parody, and the phrase "Twenty-three, skidoo!" was used by Broadway comedians to parody this moment. This seems likely to be an instance of comedians using an already-popular slang juxtaposed against a well-known dramatic moment for the resulting comic effect, and not an indication of invention, although the theatrical usage may have popularized the expression, or made it more widely known.
- It is said that 23 was an old Morse code signal used by telegraph operators to mean "away with you." (The same story accounts for 30 as "end of transmission", a code still used by modern journalists in North America, who place -30- at the end of articles as a sign to editors. However, the Western Union 92 Code, which is the source of 30 and other numbers like 73 and 88 still used in amateur radio, lists 23 as "all stations copy".)
- An early 1900s Death Valley town had 23 saloons (many basically tents). A visit to all, going 23 skidoo, meant having a very good time.
- Death Valley National Park interpreters have sometimes given as an explanation that the early 1900s mining town of Skidoo, California required that a water line be run from the source of water on Telescope Peak to the town – a distance of 23 miles. Most thought it would be easy, but the immensely hard rock along the course made it very difficult; it was eventually accomplished by a determined engineer. The term "23 Skidoo" was then used as a statement of irony, something like "duck soup": a reference to something apparently easy, but actually very difficult. Other interpreters simply say the 23 mile pipeline and the popular slang phrase is what gave the town its name.
- A jump rope rhyme that ended up "butterfly, butterfly, twenty three to do" dates to 1909 and may be the origin of this phrase.
- In The Literature of Slang (p. 38), W.J. Burke claims that the term "skidoo" was coined in 1906 by the musical comedy star Billy B. Van, citing an article in the Indianapolis Morning Star, March 31, 1906.
- In the book The Age of Uncertainty by John Kenneth Galbraith (Houghton Mifflin, 1977), Skidoo 23 refers to the abandonment of a town, Skidoo, in the Panamint Mountains of Death Valley National Park in California in the early 1900s. The number 23 apparently refers to the number of miles water had to be piped to the town and its sole reason for being; the mining of gold. After the mines were depleted, the town ceased to exist.
- In the book The Confessions of a Con Man as Told to Will Irwin by Will Irwin (B. W. Huebsch (New York) 1913), 23 relates to a rigged dice game called a cloth that travelled with small American circuses and carnivals in the latter part of the 19th century. It referred to a square marked 23 You Lose on the cloth which had 48 printed squares but only the one You Lose square. After making a big bet, the sucker was at some point persuaded that he had rolled a 23, had thereby lost his money and should stop squawking and beat it. This became, by a logical extension, an in-crowd, underworld expression indicating that for whatever reason the person addressed would not get what he was seeking and should clear out.
Examples of use
- The Love Sonnets of a Car Conductor (1908):
A True McGlook once handed this to me:
When little Bright Eyes cuts the cake for you
Count twenty ere you eat the honey-goo
Which leads to love and matrimony – see?
A small-change bunk what's bats on spending free
Can't four-flush when he's paying rent for two.
The pin to flash on Cupid is 'Skidoo!'
The call for Sweet Sixteen is 23."
- The House Boat Boys; or Drifting Down to the Sunny South (1912):
"Just back up along the beach, and if you make the first move to do anything I'm going to shoot. Now, twenty-three for yours, mister, Skidoo! We don't want your company; not today," said Thad.
- Make Way for Tomorrow (1937):
" - Say 99. - What for? That can't cure a cold. I'd rather say 23 to you, but I guess you're too young to know that means "skidoo."
- A Tree Grows in Brooklyn (1943):
He dispersed the crowd very simply by telling them he'd send for the pie wagon and take them all down to the station house if they didn't twenty-three skidoo.
- Cheaper by the Dozen (1948):
He took Mother for a ride in his first automobile.... As Dad and Mother, dressed in dusters and wearing goggles, went scorching through the streets of Boston, bystanders tossed insults and ridicule in their direction... "Get a horse. Twenty-three skidoo."
- The saying was in popular usage prior to 1912, as it appears in the transcript of the Titanic Inquiry:
6341. Then was it that watertight door, which you see on the plan is in the alleyway, which is in front of your room?
- I am not sure, but I think it is No. 23 door.
6342. I do not know their numbers, but was it the one just forward of your room?
- Yes, in the alleyway.
6343. And you actually saw them doing that?
- Yes, they were working on it.
6344. You are quite right; it is No. 23 door?
- We used to call it the skidoo door, on account of the number. That is how I remember the number.
6345. (The Commissioner.) I do not understand that?
- It is an American joke.
6346. Will you explain it?
- I could not explain it, my Lord.
6347. (The Solicitor-General.) At any rate, it connects No. 23 with something about skidoo?
- William S. Burroughs wrote a short story in 1967 titled "23 Skidoo".
- In an episode of Popeye the Sailor Man (1954), titled "Taxi-Turvy", Olive Oyl asks Popeye to take her to 23 Skidoo Street: "23 Skidoo Street, driver."
- Aleister Crowley in The Book of Lies (c. 1912–13) titled Chapter 23 "Skidoo", with the comment that "23" and "Skidoo" are American words meaning "Get out".
- There is a post-punk band originating in the 1970s named 23 Skidoo.
- The password '23skidoo' was used by Microsoft to encrypt
WFWSYS.CFGconfiguration file using RC4, which was used in early Windows for Workgroups installations.
- Spat what he knew, energy for true. To all fake rappers, twenty-three skidoo - "Sofa King" by Dangerdoom, lyrics by MF Doom
- Wentworth, Harold; Flexner, Stuart Berg (1960). Dictionary of American Slang. New York City: Thomas Y. Crowell. ISBN 978-0062701077.
- Popik, Barry. "Twenty-Three Skidoo (myth)". The Big Apple. Retrieved 1 March 2015.
- Brown, Peter Jensen (17 February 2015). "Skedaddle, Skidoodle, Skidoo - the Vanishing History and Etymology of Twenty-three Skidoo". Early Sports 'n' Pop Culture History Blog. Retrieved 1 March 2015.
- Douglas, George H. (2004). Skyscrapers: A Social History of the Very Tall Building in America. McFarland and Co. p. 39. ISBN 0-7864-2030-8.
The intersection in front of the [Flatiron Building] was always a congested spot, and a windy one, too, and in the old days the corner was a famous spot for young lads to watch women's skirts being whipped around. So famous was the spot, in fact, that policemen would occasionally have to shoo away these perpetual watches, and the expression 'Twenty-three Skidoo' was said to have been born on this windswept corner.
- Independent Film Channel Indie Sex: Censored (2007), viewed Feb 10, 2008
- Brown, Peter Jensen (17 February 2015). "Skidaddle, Skidoodle, and Skidoo - the Vanishing History and Etymology of Twenty-Three Skidoo". Early Sports 'n' Pop Culture History Blog. Retrieved 5 March 2015.
- "none". Morning Herald. March 17, 1899.
- Popik, Barry. "Twenty-three Skidoo Myth". The Big Apple. Retrieved 5 March 2015.
- "Literary Notes". The Washington Times. October 22, 1899. p. 8.
- Buchan, Jamie (2009). Easy as Pi: The Countless Ways We Use Numbers Every Day. Pleasantville, NY: Reader's Digest. ISBN 978-1-606-52278-3. Retrieved 26 June 2017.
- Metcalf, Allan (2016). From Skedaddle to Selfie: Words of the Generations. Oxford: Oxford University Press. pp. 63–64. ISBN 978-0-19-992712-8. Retrieved 26 June 2017.
- Aldridge, A.F. (1902). The Yachting Record: Summaries of All Races Sailed on New York Harbor, Long Island Sound and Off Newport, in 1901. New York: Thompson and Company.
- Green, Martin (April 18, 1904). "The Man Higher Up". The Evening World. Retrieved 1 March 2015.
- Wodehouse, P.G. (2011) . Psmith, Journalist. CreateSpace. p. 112. ISBN 978-1-4662-7530-0.
- Benecke, Mark (2011). "The Numerology of 23". Skeptical Inquirer. Committee for Skeptical Inquiry. 35 (3): 49–53.
- "The Bright Ones". Los Angeles Herald. April 5, 1906. p. 3. Retrieved 5 March 2015.
Tom Lewis, as the Unknown, is responsible for most of the good ones and his "23" and "skiddoo" and a few others never failed.
- "Answers to Queries: Twenty-Three". The San Francisco Call. September 3, 1906. p. 8. Retrieved 5 March 2015.
The man who introduced "Twenty-three Skidoo" to the people of the United States was George Cohan, the vaudeville singer.
- ""Yankee Prince" Next Attraction at the Columbia". The Washington Times. September 12, 1912. p. 11. Retrieved 5 March 2015.
Mr. Lewis, famous the country over as originator and best exponent of many familiar slang phrases, such as . . . "twenty-three" . . . .
- "Jiu Jitsu Sells". Dakota Farmers' Leader. August 18, 1905.
- "Hyrum On The New Year". Goodwin's Weekly. January 6, 1906. p. 6.
- Holloway, Diane; Cheney, Bob (2001). "6". American History in Song: Lyrics from 1900 to 1945. San Jose: Authors Choice Press. p. 45. ISBN 0-595-19331-5. Retrieved 26 June 2017.
- "Keep the Store Busy During August". Shoe Retailer and Boots and Shoes Weekly. Vol. 59. August 4, 1906.
- Wreck Commissioners' Court, Proceedings before the Right Hon. Lord Mersey on a Formal Investigation Ordered by the Board of Trade into the Loss of the S.S. Titanic, question number 6344 http://www.titanicinquiry.org/BOTInq/BOTInq06Joughin03.php
- "'Tad,' Cartoonist, Dies In His Sleep". The New York Times. May 3, 1929.
Thomas A. Dorgan, Famous For His 'Indoor Sports,' Victim of Heart Disease. Was A Shut-In For Years. Worked Cheerfully at Home in Great Neck on Drawings That Amused Countless Thousands. His slangy breeziness won immediate circulation. It was he who first said 'Twenty-three, Skidoo,' and 'Yes, we have no bananas,' 'apple sauce' and 'solid ivory.' Other expressions that are now part of the American vernacular include 'cake-eater,' 'drug-store cowboy,' 'storm and strife,' 'Dumb Dora,' 'dumb-bell,' 'finale hopper,' 'Benny' for a hat and 'dogs' for shoes.
- Mansch, Larry D. (1998). Rube Marquard: The Life & Times of a Baseball Hall of Famer. McFarland and Company. ISBN 0-7864-0497-3. p. 96, "Lewis sat on Mike's lap and acted as a dummy to Mike's ventriloquist. The pair first came up with the expression 'twenty-three skidoo.'"
- "Twenty three skidoo". The Phrase finder. Archived from the original on 14 June 2006. Retrieved 2006-06-02.
- Richard Phillips Numbers from one to thirty-one: 23
- Word Detective "23 skipdoo"
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- Selzer, Adam. "Teddy Bear, Teddy Bear: The Long History of a Jump Rope Rhyme". Playground Jungle. Archived from the original on April 16, 2014. Retrieved April 16, 2014.
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- Rathbone, St. George (1912),
- Smith, Betty (2005) . A Tree Grows in Brooklyn. Harper Perennial Modern Classics. ISBN 0-06-073626-7., p. 118
- Gilbreth, Frank B.; Carey, Ernestine Gilbreth (2002) . Cheaper by the Dozen. HarperCollins. ISBN 0-06-008460-X. p. 67
- "British Wreck Commissioner's Inquiry – Day 6 – Testimony of Charles Joughin, cont". Titanic Inquiry Project.
- http://www.amara.org/en/videos/uoV8V7NWbHQ2/en/15259/[permanent dead link]
- "Peter Gutmann Homepage". January 17, 1996. Retrieved June 14, 2021.
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