When a person pulls down their swim trunks and attempts to crest the water like a dolphin breaching the surface, thus exposing their pale, white asses to the world. A variant on mooning in a swimming context.
by Croooooooow! April 16, 2014
by lethalvilledotnet November 14, 2008
little jack found a white dolphin pill and ate it, he was soon enough having the best time of his life.
by southerncalman April 28, 2008
An aquatic maneuver in which, whilst swimming under water, the swimmer pulls down their bathing suit and then surfaces only their bare ass (like a dolphin surfacing its dorsal fin) to unsuspecting fellow swimmers and beach-goers. The white-finned dolphin is ideally executed by one with the palest of asses.
by biffrichards July 6, 2006