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1.
WDW
an acronym for the expression: "Whatever, dude. Whatever."

Used to express contempt.
Nate: Where were you for so long?
Chris: I was banging your girlfriend.
Nate: WDW.
by Chris April 16, 2005
 
2.
WDW
Similar to the above, but should be noted that it is most often used in IM sessions for shorthand expressing disregard for a previous statement, or malcontent for the others actions or neglect.

This has also been ported over to speech, where you can say the laters as written, or more easily expressed by saying "Dub d dub".
In person -
Nate: Chris, you are a blatant homo.
Chris: And you like it.
Nate: Dub d dub.
by Nate April 18, 2005