fucknuckle 

A person who is really annoying, basically a fun way of saying a dickhead.

Maria kept following me so I called her a fucknuckle.

fucknuckle by nyommmmm June 19, 2016

fucknucker 

When you fail horrendously and can't think of some bland interjection, such as "shit!" or "fuck!"

"Dude, he just got dumped by the fifth person these past two months."

"Aw, fucknucker. That sucks, man."

fucknucker by A Separation Between Universes July 5, 2018

Fucknuckle 

When someone is a damn fucking idiot. (Typically used in Australia)

Jimmy: Can Pigs Fly?
Kyle: You absolute fucknuckle!

Fucknuckle by Aussiebummer69 July 14, 2016

Fucknuckle 

An idiot who digs (looks) into things that should not be dug (looked) into, only to find out they're wrong about why they went in search and also in what they found.

Stupid Fucknuckle got it wrong!

Fucknuckle by Aj Harvey May 17, 2008

fucknuckle 

The diagonal slice on the top of the corner pocket on a pool table.

I would have cleared up if I hadn't hit the fucknuckle

fucknuckle by Marky Marky Pritchmeister September 20, 2005

oh fucknuckle 

When a person is mad and wants to say fuck in front of a Karen or Karen's child

man: Oh fucknuckle!
Child:Huh?

oh fucknuckle by 😩✌ ah May 26, 2021

Fucknuckle 

to screw something up.

Whenever chet works on his bike he always pulls a fucknuckle.

Fucknuckle by Dick Fitzwell July 12, 2004