Fat Nut 

A large amount of semen, ejaculate

That bitch was so hot I busted a Fat Nut on her tits!!!

Fat Nut by DoctorVegas November 30, 2009

Fat Nut 

someone with a large head. scots insult.

"fuck up, ya fat nutted, bawheedit bastard."

Fat Nut by conor147cfc March 8, 2017

Fat Nut 

Someone that lays around all day and is very fat.

"Hey you fat nut! Get up!"

Fat Nut by Hairy Monk January 22, 2017

Busting a Mighty Fat Nut 

v. Ejaculating in a satisfying or otherwise noteworthy manner, especially if an unusually high volume of semen was produced. If the nut was busted under embarrassing and/or hilarious circumstances, chances are it was a mighty fat nut.

I was jerking off in my room, and right as I was about to finish my mom called me down for dinner, and I yelled "coming!", then started laughing really hard at the double-entendre, but the laughter made me double over and I ended up busting a mighty fat nut all over my brand-new polo shirt.

Busting a Mighty Fat Nut by The Splartmeister January 7, 2017

i just busted a fat nut earlier today 

when you busted a fat nut earlier today.

Yo, I just busted a fat nut earlier today!

i just busted a fat nut earlier today by xray489 March 21, 2021

Bust a fat nut 

When you masturbstate for straight 6 rounds after an extended period of abstinence due to circumstantial inconveniences.

End of the summer camp:
Jim: ‘Ye when I’m back home imma bust a fat nut’
Jack: ‘nice’

Bust a fat nut by 'Filthy Mortal Child' July 13, 2019

mighty fat nut 

A gigantic ejaculation

I just busted a mighty fat nut in the neighbor's dog.

mighty fat nut by AnimeTiddies6969 December 5, 2016