butt rocker Share definition Flag Someone who listens to butt rock. They usually have big long hair or a mullet and wear rock t-shirts and jeans. That butt rocker over there is listening to Def Leppard. butt rocker by Jack Batemaster January 8, 2006 0 0 Get merch Get the butt rocker mug. Buy Now — $32.95 See more merch