A wet T-shirt contest is a competition involving exhibitionism, typically featuring young female contestants at a nightclub, bar, or resort. Wet T-shirt contestants generally wear thin white or light-colored T-shirts without bras, bikini tops, or other garments beneath. Water (often ice water) is then sprayed or poured onto the participants' chests, causing their T-shirts to turn translucent and cling to their breasts. The comparatively rarer male equivalent is the wet boxer contest, sometimes held at gay bars.

Contestants may take turns dancing or posing before the audience, with the outcome decided either by crowd reaction or by judges' vote. In racier contests, participants may tear or crop their T-shirts to expose their midriffs, cleavage, or the undersides of their breasts. Depending on local laws, participants may be allowed to remove their T-shirts or strip completely naked during their performance.