Fuck-Knuckle

The knuckle of the hand that was used to fist the dirty asshole of another man

This particular knuckle on this particular hand has seen more ass than you will in your entire life-a genuine fuck-knuckle

by Breadstick Octahedron October 10, 2017

Fuck knuckles

Fuck knuckles are when a teenage boy has been masterbating and constantly has jizz on his knuckles

I will never shake hands with my nephew Johnny because he constantly has fuck knuckles and seems to be always jacking off.

by sturtle September 10, 2014

fuck knuckle

a fuck knuckle is like a dick knuckle or a fucktard
basically its a person that has the IQ of a swamp flea

dude ur a fuck knuckle shut the fuck up!!

by toostr82bgay December 24, 2004

fuck knuckle

a large mass around the penis. resulting from torn blood vessels when a penis is "broken" or bent while erect. often referred to as dick gristle.

he had a fuck knuckle in the middle of his penis.

by Mrewood November 4, 2010

Fuck Knuckle

Mary is a Fuck Knuckle

by Fuck Knuckle September 13, 2003

fuck knuckle

Someone driving at such a low rate of speed as to piss off the driver of the huge truck behind them. Usually used to verbally encourage said person to hurry the fuck up.

"Let's go there, fuck knuckle."

by KChute October 21, 2007

Fuck Knuckles

How you say you want to bang and fuck your shit up at the same time.

Bitch, I wanna give you some good ole fashioned fuck knuckles.

by 1oftheBOYS February 12, 2021