A large, ignorant and lazy individual with poor hygiene. Smells like they haven’t wiped their ass since the 8th grade.
by Jack Mahaugov September 16, 2022

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.
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

When hitting a large jump (booter) mainly on skis there is a roller or knuckle that the jump sits on. If you hit that jump and land a little short that is called a case. But if you case the jump so hard that you are ejected from your skis and you thrust your body so hard against the landing that is called a Knuckle Fuck because you are fucking the knuckle.
by AbsorbedSpoon3 July 5, 2019

by CurseWordGenerator2000 January 28, 2019

by Invented that word December 10, 2024

by Marty's ass September 25, 2020

What a fuck-knuckle.
by #CoronaTime_420_69_51 March 24, 2020
