In call of Duty Modern Warfare 2, the Fat
Motherfucker has been named by it's inventor Valmer, for the "Juggernuts", the description was called upon the "Juggernuts" because of the amount of
clothes they wear which make called by the name, Fat
Motherfuckers.
Player # 1: Hey, where is the Fat Motherfucker?
Player # 2: He's hereee!, kill 'em Fat Motherfuckers
Player # 3: I just got raped by one of them, Fuck 'em
Player # 1: Wooohoo, we fucked 'em Motherfuckers ;)