Fuck Knuckle

A man with such a small dick that all it feels like when he fucks a woman is him fucking her with the knuckle on his fist.

HER: Enough playing around stick it in already
HIM: What you talking about Willis? It is in!
HER: I should have known you'd be a fuck knuckle.

by Cereal Killer Bitch March 20, 2017

Knuckle Fuck

Getting fucked while your balls are vibrating from the wavelengths of Knuckle Puck’s live performance.

Ugh, I can’t wait to get Knuckle Fucked in Orlando in 2 weeks!

by TaraWard10 November 21, 2023

fuck knuckled

to go knuckle deep into the anal regions of the other gender while your other knuckle is 5 inches deep in their other genital region.

you have just been fuck knuckled by him

by Gizard XD February 28, 2017

fuck knuckle

A slang term for a dumb mother fucker who really does not understand they are a dumb mother fucker.

After a lame conversation I had to say, “He is such a fuck knuckle”.

by Wayne Schlinger & Kevski September 23, 2021

fuck knuckle

When said person is being annoying or is being a headass

Person 1: “God, Michael is being such a fuck knuckle”
Person 2: “You can say that again”

by CurseWordGenerator2000 January 28, 2019

fuck knuckle

Someone who is beating off, fucking their own hand fuck knuckle

Hey fuck knuckle stop beating off

by Invented that word December 10, 2024

Fuck Knuckle

The second knuckle of any digit when inserted into an orifice in a sexual manner.

I was fingdipin' this girl to the fuck knuckle after the baseball game the other day.

by elcapitandeganja October 18, 2013