1) A large female posterior, combined with a slim waist
2) A woman possessing the above.
3) A nickname for a specific girl possessing the above.
2) "She used to be slim, but The Pill turned her into a badunkadunk."
3) "Her? Yeah, that's Badunkadunk. Careful, she bites."
dats a phat!!!! asssssss
a perfect apple ass
Verb: Her ass seems to be badunkadunking