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2.
same as 'what are you'
whaddaya dooin?
by Valyn May 15, 2003
 
1.
Also can mean: what do you.
Whaddaya say?
I'll do it.
by Ferg19 May 30, 2005
 
3.
slang for what do you.
Dude 1:Whaddaya want for your lunch?
Dude 2: Caviare.
by uttam maharjan June 29, 2012