badunka-dunk butt Share definition Flag noun an ass that bounces whe the bitch walks or when u bang her from the back like boing, boing Damn, I have not seen a badunka-dunk butt like that since your mom's. badunka-dunk butt by Bootie Master November 6, 2003 0 0 Get merch Get the badunka-dunk butt mug. Buy Now — $32.95 See more merch