Bayou Ass Share definition Flag Similar to Swamp Ass, but much more sweaty and uncomfortable. Dude 1: "Damn, my ass is sweaty as hell and I have a monster wedgie."Dude 2: "we call that Bayou Ass." Bayou Ass by BigMeech(larryhoover) January 3, 2011 Get the Bayou Ass mug.