A combination of "fanny" and "ass" usually with a little cartoon picture to go along with it that looks like an ill drawn ass.
1. Can be used as an insult against people who dont know what it means. Usually shouted across the room.
2. Can be used instead of a casual hello.
3. also appears as the drummers stage name. "Fabian Fasslift"
Fabian: "Hey you Fass!"
Maxx: "Awwww Sup!"
Maxx: "Dude cheack out that Fass!"
Fabian: " OMG SHIT!"
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