its not punching, its when you fuck someone hard in the face....with your knuckles
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
One who combines the attributes of a knucklehead and a fucker.
What the hell! Are you some kinda knucklefuck?
A term used to describe a person who is a general dumb-ass.
"Ernest is a real knuckle fuck" or "What a fucking knuckle fuck"
to punch or hit, especially in anger.
Im gonna knucklefuck you if you dont shut the hell up!
to put it simply, fisting.
i knuckle fucked three chicks and a dude last night.
The act of sexy punching (fisting).
Margaret, come here. I wish to give you a knuckle-fuck