Top Definition
A recipient of anal sex who flexes his or her buns upon penetration.
Person 1: here we go...
Person 2: (flex)
Person 1: ur such a bonecruncher
Person 2: (flex)
by Dunn Dorr July 07, 2014

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.