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Yes, affirmative, or 'yes, I would do her.' Bruno put this one on the map. Some people think its short for, "Whats up?", which it can, but it is better reserved for times depicted in the example.
Dude 1: Yo check out that chick...

Dude 2: Vassup or nish nish?

Dude 1: VASSUP!!!

Dude 2: Ya I would hit that too!
by Trav907 July 09, 2009