One who is above all others, can kick anyone's ass. He/She is a general beast whom all like. Ass schmoner, however, can also be used as an insult, implying that you ruin everything in the room, much like an ass will create a fart to ruin everything in a room.
Insult : "YOU ASS SCHMONER!"
(usually in a German accent)
Compliment: "That was awesome man! You're a real Ass Schmoner!"