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1.
short form of "what's up"- simplified as a form of greeting, as in "hi."
"hi B.J." "wassup LeRoy."
by T D Olson October 22, 2003
 
2.
what is up.
wassup homie!!
by Mukti June 29, 2004
 
3.
Wassup is another way of saying "What's up". You can also say Wazzup.
"Wassup dude!"
"Not much, dude"
by Bluestrike February 13, 2010
 
4.
Wuts good..Wuts poppin'... Its thu G'd up way of sayin hi, whats goin on
Adrian:Wuts poppin' dawg, wuts good for tonite?

Luis: I don't know playa, let me call these chicks up to see wassup.
by TxBwoii June 22, 2007
 
5.
A way to say What's up to people with the last name of Wass. A person with the last name Wass is only aloud to use it.
Tom Wass: WASSUP?
Jim Wass: nothing much

Tyler Dumby: WASSUP?
Jim Wass: Fuck off
by Tom Wass June 12, 2009
 
6.
Wassup means whats up. Whats up is a way of asking how some one is, and or what someone is doing. Se Wassssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssup.
Most people with an IM start a conversation by saying Wassup, or its shortining sup. Sup can mean the same thing, or a random thing. Only in America
Most people say to me
Wassuo Homefrog
by Homefrog October 29, 2003
 
7.
Technical definition used by technicians in the elevator repair industry, to define the attitude of the elevator.
"Otis, was elevator number one on it's way down?"
"No Jahmel, it wassup"
by Redbush the Pirate January 06, 2004