Big Ass is a Thai rock band. The term may also refer to: A slang term for one's buttocks affected by Steatopygia. Big Ass Spider!, a 2013 horror comedy film. Big Ass Truck, an American rock band. "Big Ass Heart," a song featured on the Glee episode "Original Song." "Big Ass Show," a festival hosted by American commercial radio station KXRK. Chris Rock: Big Ass Jokes, the first HBO special by American comedian Chris Rock. Big Ass Fans, an American company which manufactures high-volume low-speed fans.