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’
by 'Filthy Mortal Child' July 14, 2019
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.
by The Splartmeister January 7, 2017