In Texas Hold Em, when a player has lost, and the hand has ended, but the losing player wants to see what the cards would have been. Never allowed in formal tournaments, occasionally allowed in informal games. Often called by a person who thinks they would have won. A person who rabbit hunts often is sometimes referred to as an Elmer Fudd.
"I'm gonna fold, but can you rabbit hunt? I want to see if I would've made my set."