Sledging is a term used in cricket to describe the practice whereby some players seek to gain an advantage by insulting or verbally intimidating the opposing player. The purpose is to try to weaken the opponent's concentration, thereby causing him to make mistakes or underperform. It can be effective because the batsman stands within hearing range of the bowler and certain close fielders; and vice versa. The insults may be direct or feature in conversations among fielders designed to be overheard. The term has also been used in other sports, as when the tennis player Nick Kyrgios insulted his opponent, Stan Wawrinka, by referring to a purported encounter between another player and the latter's girlfriend.
There is debate in the cricketing world as to whether this constitutes poor sportsmanship or good-humoured banter. Sledging is sometimes interpreted as abuse, and it's acknowledged some comments aimed as sledges do sometimes cross the line into personal abuse, however this is not always the case. Sledging can sometimes be a humorous attempt at distraction. Former Australian captain Steve Waugh referred to the practice as 'mental disintegration'.
According to Ian Chappell, the use of "sledging" as a term originated at Adelaide Oval in either the 1963–1964 or 1964–1965 Sheffield Shield competition. Chappell claims that a cricketer who swore in the presence of a woman was said to have reacted to an incident "like a sledgehammer". As a result, the direction of insults or obscenities at opponents became known as "sledging". Despite the relatively recent coining of the term, the practice is as old as cricket itself, with historical accounts of witty banter between players being quite common.
According to the BBC’s Pat Murphy: “My understanding is that it came from the mid-sixties and a guy called Grahame Corling, who used to open the bowling for New South Wales and Australia … apparently the suggestion was that this guy's wife was [having an affair] with another team-mate, and when he came into bat [the fielding team] started singing When a Man Loves A Woman, the old Percy Sledge number.”
The 1974–75 Australians were labelled the Ugly Australians for their hard-nosed cricket, verbal abuse and hostile fast bowling. "Behind the batsmen, Rod Marsh and his captain Ian Chappell would vie with each other in profanity", and Tom Graveney wrote "It was an open secret that he used to encourage his players to give a lot of verbal abuse to rival batsman when they were at the wicket in an attempt to break their concentration."
West Indian batsman Viv Richards was notorious for punishing bowlers that dared to sledge him. So much so, that many opposing captains banned their players from the practice. However, in a county game against Glamorgan, Greg Thomas attempted to sledge him after he had played and missed at several balls in a row. He informed Richards: "It's red, round and weighs about five ounces, in case you were wondering." Richards hammered the next delivery out of the cricket grounds and into the nearby river Taff. Turning to the bowler, he commented: "Greg, you know what it looks like, now go and find it."
Sledging is common at most levels of the game in Australia, but one Australian with a particular reputation for sledging was former fast bowler Merv Hughes. His intimidating and aggressive bowling style was often accompanied by a mixture of humorous witticisms, and vitriolic abuse. On occasions he crossed the line from sledging to insulting; however, there are numerous occasions of classic sledges delivered by Hughes.
One incident, as recalled by Hughes, was when he was bowling to Pakistan batsman Javed Miandad, who informed the overweight bowler that he "was too fat to play cricket" and that he "should be a bus driver". After being taunted for about five overs, Hughes decided to bowl around the wicket, and bowled a bouncer getting Javed caught at gully. As he was celebrating with his teammates, Hughes stuck his hand out in Javed's path, and yelled, "tickets please!".
Harbhajan–Symonds incident (2007–2008)
Sledging came into the media spotlight during the 2007–08 Indian tour of Australia when Harbhajan Singh was accused of alleged racial abuse towards Andrew Symonds, who is of Jamaican ancestry and the only 'black' player in the otherwise 'all-white' Australian team. The allegation was not proved and a proposed three-match ban on Harbhajan was lifted. He was instead charged with a Level 2.8 offence (abuse and insult not amounting to racism) to which he pleaded guilty and was fined 50 per cent of his match fees, although the Appeals Commissioner later noted that had he been aware of Harbhajan's prior record, a one-Test ban would have been issued.
2011 Cricket World Cup
On February 19, 2011, during the first official match of the 2011 Cricket World Cup between India and Bangladesh, Virat Kohli hurled comments at Bangladeshi bowler Rubel Hossain: "Maa ki chut, chal ball daal" (Translation: Keep bowling, motherf*cker)
2013–14 Ashes series
During the 2013-14 Ashes, a stump microphone clearly caught Australian captain Michael Clarke telling England's Jimmy Anderson to "get ready for a broken fucking arm" during the first Test at The Gabba. Clarke was fined 20 per cent of his match fee by the ICC for the outburst. 
2014-15 India Tour of Australia
During the first test match between Australia and India at Adelaide, David Warner yelled "Come On!" at Varun Aaron after he was caught on a no-ball. The expression was a mimic of what Aaron said when he bowled the no ball delivery and thought he had Warner out. Shikhar Dhawan and Virat Kohli intervened Warner.
Warner was also heard telling Rohit Sharma to "Talk in English". David Warner was fined 50% of his match fees after this particular incident.
On December 26, 2014, during the Third test match between Australia and India at Melbourne, after hitting Mitchell Johnson for a four over his head, Virat Kohli blew kisses at Johnson and provoked him to bowl a better length.
After the fall of an Australian wicket on Day 3, Virat Kohli greeted the new batsman, Brad Haddin, by saying a few words to him. Kohli continued to sledge Haddin. When Haddin was beaten off pace on the very first ball, the bowler, Ishant Sharma, ran into Haddin and glared at him. Kohli was seen teasing and clapping at Haddin on the field. Virat Kohli, Shikhar Dhawan, David Warner and a few other players received warnings prior to the 2015 Cricket World Cup.
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- Lighter examples of sledging – BBC Sport
- "Harbhajan Singh – Andrew Symonds racism hearing". Cricketcircle.com. Retrieved 2 November 2008.
- Praverman, Frank (29 January 2008). "Harbhajan Singh cleared of making racist comments to Andrew Symonds". Timesoline (London). Retrieved 2 November 2008.
- "The reason behind Rubel Hossain's celebration after dismissing Virat Kohli". sportskeeda.com. Retrieved 10 August 2015.