Top Definition
Short for "What's up" in Internet chat. Intuitively it may seem to be an abbreviation of "Word up," but in fact it applies exclusively to "What's up."
Elusive: wdup pimpin
pancharelli: about to trashcan rookie, can u believe dat?
by SG4Life September 27, 2005
A word often used in Multiplayer Video Game Chat or even Aol Instant messanger (aim) and other messaging systems. Wdup is to shorten the term What's up or another way of saying Sup
Hotsexymomma:not much what about you
by ll4m4 June 08, 2005
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