The Frug (pronounced "froog") was a dance craze from the mid-1960s, which included vigorous dance to pop music. It evolved from another dance of the era, the Chicken. The Chicken, which featured lateral body movements, was used primarily as a change of pace step while doing the Twist. As young dancers grew more tired they would do less work, moving only their hips while standing in place. They then started making up arm movements for the dance, which prompted the birth of the Swim, the Monkey, the Dog, the Watusi, the Mashed Potato, and the Jerk. The Frug is sometimes referred to as the Surf, Big Bea, and the Thunderbird. 
A perfect example of a Frug is found in the movie Sweet Charity (1969), which contains a number called "The Rich Man's Frug", a wildly energetic dance number comprising three "movements" ("The Aloof", "The Heavyweight" and "The Big Finish") that showcases director Bob Fosse's distinctive choreography style, particularly his creative use of unusual poses, gestures, and arm movements. The evolution of Frug also signified maturation of theatricality Fosse's dance, departing regimentation towards visual dissonance, where every dancer could perform their own moves.
In a song of the same name, "The Frug" is referenced by the band Rilo Kiley. It appeared on both their debut album The Initial Friend E.P. and on the soundtrack to the movie Desert Blue. It was performed on Season 1 Episode 9 of the television show Once and Again.
In recent years
Singer Beyoncé uses the dance craze as inspiration for the music video "Get Me Bodied". The video was inspired by the "Rich Man's Frug" dance scene from the film Sweet Charity.[not in citation given]
The Frug was the inspiration for the name of the band, "The Frug" in Huntsville, TX.
In 1964, in "In the Red Light: A History of the Republican Convention in 1964," published in the November 1964 issue of Esquire, Norman Mailer wrote: "The American mind had gone from Hawthorne and Emerson to the Frug, the Bounce, and 'Walking the Dog', from The Flowering of New England to the cerebrality of professional football in which a quarterback must have not only heart, courage, strength and grace but a mind like an I.B.M. computer." The piece is collected in Mailer's Cannibals and Christians (1966).
In Mystery Science Theater 3000 episode #1007 ("Track of the Moon Beast"), Crow refers to the dance, while the moon beast is dying, by saying: "The arrow caused him to frug."
On the crime-drama Law & Order, in the season-two opening episode "Confession," Detective Mike Logan states that his plans for the evening are to review case notes with his (soon to be killed) partner, Max Greevy, and then, he says, "I'm going frugging with Patsy Kelley."
- Angus Stevenson; Maurice Waite (18 August 2011). Concise Oxford English Dictionary: Book & CD-ROM Set. Oxford University Press. pp. 572–. ISBN 978-0-19-960110-3.
- Gayle Kassing (2007). History of Dance: An Interactive Arts Approach. Human Kinetics. p. 236. ISBN 978-0-7360-6035-6.
- Karen Lynn Smith (2010). Popular Dance: From Ballroom to Hip-hop. Infobase Publishing. pp. 137–. ISBN 978-1-4381-3476-5.
- Pamyla Alayne Stiehl (2008). The "Dansical": American Musical Theatre Reconfigured as a Choreographer's Expression and Domain. ProQuest. pp. 177–. ISBN 978-0-549-50848-9.
- Martin Gottfried (2003). All His Jazz: The Life & Death of Bob Fosse. Da Capo Press. pp. 181–. ISBN 978-0-306-81284-2.
- "Sweet Charity "Rich Man's Frug"". YouTube. Retrieved 2012-08-28.