Top Definition
Boobs or "tits" that sag so far they slap against the persons knees.
Dude check out that grandma shes totally got knee grinders!
by HAHA KYLE H. COLIN B. DID THIS December 11, 2010

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.