Debagging, also known as depantsing and just known as pantsing in the United States, is the pulling down of a person's trousers or underwear mostly against their wishes, typically as a practical joke, but in other instances as a (somewhat common) sexual fetish. The most common method is to sneak up behind the intended victim, grab the trousers at the waist, and apply a quick downward tug before the victim is aware of the assailant's presence.
Debagging is a common prank in school gym classes as a form of bullying. Its most extreme form includes running the trousers up the school flagpole. Some U.S. colleges before World War II were the scenes of large-scale "depantsing" scraps between freshman and sophomore males, often involving more than 2,000 participants. It is also an initiation rite in fraternities and seminaries. It was cited in 1971 by Gail Sheehy as a form of sexual assault against grade school girls, which did not commonly get reported, although it might include improper touching and indecent exposure by the perpetrators. The United States legal system has prosecuted it as a form of sexual harassment of children.
In Britain, especially historically at Oxford and Cambridge Universities in England, the term is known as "debagging" (derived from "Oxford bags", a loose-fitting baggy form of trousers).
The corresponding term in Australia is dakking, dacking or daxing, which originated from DAKS Simpson, a clothing brand that became a generic term for pants and underwear. The term double-dacking is used when both the pants and underwear are pulled down. In Scotland the process is often known as breeking or breekexxing from the word "breeks" meaning trousers. In New Zealand the act is known as giving someone a down trou or "a drou"; in Ireland jocking, zoonking or ka-blinking; in the north of England kegging (or quegging).