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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.
fucknut by ifukdyermom February 20, 2009
an annoying, stupid asshole who thinks more of himself than anyone would ever think.
David Sch... is a fucknut!
fucknut by anonymous1anonymous2 January 16, 2009
The most infuriating and frustrating of all humans
fucknut by damn_air January 26, 2005
Man you are such a fucknut!
fucknut by Christy February 12, 2003
a word used in exclamation,
1. said to someone who is being arrogant and annoing
2.a word to explain disbeleif
1. shut up you fucknut
2. fucknut! damn...i dont beleive it
fucknut by halet July 9, 2004
A nut on a vehicle, or other mechanical device, in a group of nuts that's usually the last nut to remove but gets rounded off presenting you with bigger problems.
Four lugnuts on my wheel came off easy, but the fifth & last one is all rounded off & I now I'm fucked... Stupid fucknut!
fucknut by Arnie Schiffer May 11, 2008