1. A derogatory word used against your oppponent when playing Call of Duty, whether online or splitscreen. When playing splitscreen, the insult is followed by a punch to the arm.
2. A loser in general.
ex 1: Joe: "YOU KNIFED ME YOU FUCKING FUCLERNUGGET TAKE THIS YOU HOE!
Tom: "OW MY ARM!"
I blew my load onto the bread, spread some peanut butter on the other slice, put them together and stuffed it in her mouth. She loved that fuckernutter.