(1) A disparaging term for a person below average intellgence; (2) a nut that has been fucked . . . very hard.
by Anonymous December 03, 2002
Like a fuckknuckle only more irritating. You may forgive a fuckknuckle but are more likely to slap someone who is fucknuts.
by catmannz July 16, 2005
Fucknut is a name for a fucking idiot, it also means when a girl sucks your nut and when a boy sticks his nut inside a girl
by mickeyDeeznutz69 March 07, 2022
by DougieEinstein August 21, 2015
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.
by ifukdyermom February 20, 2009
by anonymous1anonymous2 January 17, 2009
by damn_air January 27, 2005