Someone who's actions are unpredictable and hazardous.
Danny: he said he loved me and now he's fucking some other guy
Jacq: Don't worry about him, you know he's a fucknut
by DannyS2 March 12, 2008
a fuck nut is some one that is a stupid person usually an insult to a person to make them cry like a little bitch.
"shut the fuck up fuck nut"
by bodie January 10, 2007
a person you'd just as soon be rid of
"You are a major fucknut."
by kitznegari November 09, 2002
A group of unethical fucking robbers that don't have the balls to tell you they've fucked you.
Those S.O.B.'s are fucknuts.

Fuck me too tears, I got robbed by those stupid fucknuts.
by f*r November 10, 2013
A group of unethical fucking robbers that don't have the balls to tell you they've fucked you.
Those S.O.B.'s are fucknuts.

Fuck me too tears, I got robbed by those stupid fucknuts.
by f*r November 10, 2013
An specific insult to a douche bag of a person

Most likely a guy
" God! You're such a Fucknut"
by Causeforeveronlylaststwodays February 08, 2013
When a man, while boning a girl, pushes it in so far that one, or both of their balls get stuck in the girl's vagina.
Haha. Look at that guy, he's got to wear a ball brace for his fucknut.
by ifukdyermom February 20, 2009

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