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e-slang for "What's up with that".
"Dude, you got like zero comments today! WUWT?!"
by Stupid Name November 13, 2007
It's an abbreviation for "What's Up With That", however it is not used much. It is not to be confused with WUT, which is a l33t term for 'What'.

Commonly used in texting.
-Mr. Teacher wasn't here today! WUWT?
by DuelOnX July 11, 2009