1: A person who is so incredibly retarded that they do literally everything in the dumbest fuckin way possible

2: A person who makes insanely idiotic mistakes on a hourly to daily basis and is too stupid to

A: Fix them.

B: Realize they did something retarded in the. first place
A: Omfg George wth are you doing? Why are you such a fuck nut?

B: My brothers are a bunch of fuck nuts.

C: Melissa doesn't realize how much of a fuck up she is, she's such a fuck nut
by TabrisDefinitions January 28, 2023
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a fun nickname for your loving wife
-you're my one and only fuck nut <3
-i love you so much, brian
by muffinman4ever February 19, 2021
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Fuck-nut; the rated R version of "loose cannon" is an insult implying that the recieving end is incapable of basic human thought, therefore indicating a need to be insulted. This is where "fuck-nut" comes in. Walk up to this "individual" and as if a magician saying abbracadabra, say it straight to their dumb fucking face.
"Excuse me kind sir."
"Yes my friend?"

"You are a bonafide fuck-nut!"
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A person who does stupid things in an effort to get clout but rather gets hate. Fuck-nut could also be a term for someone you don't like.
Example 1
Man 1:did you hear ed, he jumped off a bridge to impress a girl
Man 2: I did. Ed is such a fuck-nut

Example 2:

KID: HEY HEY HEY
GIRL: SHUT UP I HATE YOU, YOU FUCK-NUT!
by A fuck-nut April 22, 2022
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