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!"
by Simonator May 4, 2006
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When you are hoodwinked into an incorrect decision, based on a misinterpretation of facts believed to be correct or general idiocacy.
Damn, Ryan was fuck knuckled into selecting Waite in his SuperCoach team .
by Up_thedons June 17, 2016
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A person who is equally a fuck head and who you want to plant your nuckel in.
Friend: Who's he
Me: Oh he's just some fuck knuckle
Friend: Wow what an idiot
by ThiccyBoii March 20, 2017
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one who seems to fuck things up everywhere he goes
After three girls enter your dorm room and begin talking to you, this is what happens after fuckn knuckles enters your room:

Girls: hey(to fuck knuckles). do you live here too?
Fuck Knuckles: (does the double arm pump and screams in a loud gay voice, like a white guy trying to be lil john) YEAAAAAH!
Girls: (they promptly leave after giving a look of disgust to fuck knuckles)
Two guys who live in the dorm room: hey fuck knuckles, thanks a lot. (the guys begin to bumrush fuck knuckles and beat the shit outta him for being such a douche)
by Brad Kronik January 1, 2006
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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.
by XxxKevinxxX August 15, 2007
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A dickhead who likes to invade everyones privacy and will happily eat cock whenever is possible. He/She talks too much and needs to be sent to South Africa to drop him/herself on his/her own head. They talk out their ass most of the time.
Look at Jackson, he's a Fuck Knuckle. Send him to India to eat rubbish. Pog.
by Ol Meanings November 6, 2020
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Idiot, tool, moron, fool, useless bastard, politician
stop telling me what to do and sort the country out you fuck knuckle!
by Englishdude January 30, 2010
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