Also known as badunkaunk, indicates that the subject has a lot of junk in the trunk. Big ass, use it to put your ashtray on. Smack it and ride the wave.
Where a chick has an ass so big you can see it from the front. Ass so big they wrote a song about it. So big you can put a tea cup on and not spill it. Not those nasty cottage chez sagy ass but something round and bootylishis!