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2.
Another form of what's up.

-What's up
-Wassup
-Wuzup
-Wasaaaaaaap
Sarah: WASAAAAAAAP!!
Me: You because you are friggin' high.
by Cortana Dragoon July 03, 2005
 
1.
Most annoying catch phrase of the new millenium. Only said when greeting someone on the phone but you have nothing to talk about. If said otherwise, it proves your idiocy.
1: Wasaaaaaaap!?
2: Wasaaaaaaaaaap!?!?
1: Wasaaaaaaaaaaaaaap!?!?
2: So, why'd you call me?
1: No reason.
2: Good gracious!
1: ... Wasaaaaaaaaaap!?
2: Wasaaaaaaaaaaaaaaap!?!?

Continues for hours.
by Bastardized Bottomburp December 11, 2003
 
3.
Meaning how r u, but then shortened (somehow) to whats up. After an extremely funny budwiser advert, it changed once again to wassssssssssaap!
(on the phone)
Dude 1: Hey dude
Dude 2: WASAAAAAAAP!
Dude 1: WASAAAAAAAAAP!
Dude 2: Just sittin @ home, havin a bud.
Dude 1: Tru.
by l December 09, 2003