Generally in referance to "booty." Meaning to have a big ol' chunky, I need to be in a ludacris video and shake it, slab of meat on your backside. Though, as it is often said in the context of "clowning," the word can be iether positive or negative.
Gary: you know that chick Taylor i was trying tohook up with?
Geoff: yeah?
Gary: well turns out shes a lesbian who is into chess
Geoff: chess? that's bunkadunk!