knucklefucker

A man who masterbates

John knuclefucked himself before he went to sleep.

by Dan March 2, 2005

knucklefuck

One who combines the attributes of a knucklehead and a fucker.

What the hell! Are you some kinda knucklefuck?

by David Nygaard January 30, 2005

knucklefuck

to punch or hit, especially in anger.

Im gonna knucklefuck you if you dont shut the hell up!

by omegavolt June 9, 2003

knucklefucker 5000

A dildo, preferably large and black attached to some rubber (or brass if you're that hardcore) knuckles.

"Man you should have scene that crazy bitch's closet. It was full of knucklefucker 5000's !!

by CanadianSyrupSperm December 9, 2017