The member in one's group of closest friends who has munged the most corpses. Note: age of corpse does come in to play.
Jordan: Dude, I've munged three 80 year olds and two 40 year olds, all with my barbed wire mung stick, I'm the Mung King.
Jalen: No dude, I've munged three 85 Year olds and three 72 year olds, all with my Oak Sage Mung Stick. I'm obviously the true Mung King