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.