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4. Fuck Knuckle
Similar to definition 1 for Fuck Nuts
Specifically a name for somebody you know and despise in one way or another.
"Have you met Wendy's new boyfriend Eric? Man, what a fuck knuckle that guy is!"
1. Fuck Knuckle
General dickhead. See also Fucker, Asshole, Cunt et al.
That's not my wife you stoopid fuck knucle!
by Izzy Stewart Apr 8, 2003 add a video
2. Fuck Knuckle
Can be used to describe a person who is generally a dickhead, or used when something goes wrong.
A) You are such a fuck knuckle

B) Fuck knuckle!
by ~primakat~ Aug 5, 2005 add a video
3. Fuck knuckle
An idiot, a dumb person.
Wow jones was a fuck knuckle to jump off that roof!
5. Fuck Knuckle
The painful bend in hard dick caused by pulling out too far and slamming your cock into the taint.
I was railing that bitch so hard I gave myself a fuck knuckle.
6. Fuck Knuckle
General term for somebody who is an useless idiot, ignorant, highly unpopular, or hated.

Commonly used by Australians to describe people in positions of responsibility who are incompetent.
Worker #1 - The boss says we have to make 34 more panels but we've only got two hours till knock off time ...

Worker #2 - Yeah right, what a fuck knuckle!
7. 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.
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