Laughin' Jokin' Numbnuts is the name given to LJN by James Rolfe, the Angry Video Game Nerd. James is a classic game reviewer with a low tolerance for bad games and LJN has consistently released poor titles.
I wanted to buy "Back to the Future" for the Nintendo Entertainment System until I found out it was a Laughin Jokin Numbnuts game.
A term used when you are laughing insanely hard. Similar to laughing your ass off, you are busting a nut, because you are laughing so hard at a persons joke.
Jeff: "Damn, look at her camel toe gobble up those tights!! Hahahahah"
Carlos: "Oh my god! I am busting a nut laughing right now!!"