1. A greeting used along the lines of: "Hi" "Wussup?" "What's Up" "i Like Cheeze" and the sort. Usually rudely responded to with a look or expression of confusion and bewilderment.
2. Can also be reffering to a very hot asian sause, which could be the same as the previous definition if thought about too hard
me: "WUSSABI YALL!!!! Hows it hanging?"
others: "What the hell is that supposed to mean?"