by Marty's ass September 25, 2020
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
A person so dumb they can't tell the diffrence of a penis or finger and think the knuckle on a finger is the end of the dick head.
That bitch was so gross I couldn't get hard. So I fucked her with my finger and told her I have a small dick. She said the end of my head was big she is so dumb what a fuck knuckle
by Rawdog75 January 13, 2025
by Invented that word December 11, 2024
by CurseWordGenerator2000 January 28, 2019
1. Don't be such a fuck knuckle.
2. That fuck knuckle crossed the highway without looking.
3. If you're going to be a fuck knuckle, you can piss off.
2. That fuck knuckle crossed the highway without looking.
3. If you're going to be a fuck knuckle, you can piss off.
by xxxxmints May 17, 2017
by #CoronaTime_420_69_51 March 25, 2020