by nutsmell March 23, 2005
by Trevor Pike February 18, 2006
When a guy's dick is soft so he squeezes the base and tries to fuck till its hard. While holding the base he hit's the other person repeatedly with his knuckles.
Well if it goes soft we have to take a break. I hate when a guy tries to knuckle fuck me. I end up with bruses.
by Wonder77 December 24, 2016
by L1feLus7 December 03, 2009
jerking off is the way you knuckle fuck. just that knuckle fucking is the new up to beat way to speak
by Daniel Coy January 19, 2009
johnny t-bagged my roommate and then left with the pizza so when he came back looking to borrow some money, i knuckle fucked the shit out of his face
by diego delavega June 30, 2006