Top Definition
The flap of skin under the buttocks of a large woman, hanging out of tight shorts or undergarments.

Looking like having two sets of butt cheeks, one on top of the other.
Her ass is so big it has a booty knocker.
by binaculars September 01, 2007

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.