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1.
don't care or don't beleave
i went to work said bob yeah whatever said jack
by kraven morehead October 06, 2003
 
2.
An expression used as an exasperation when tense, flustered or angered.
"Hey Boniffa-Lattifa Jackson, we could use your pants to make a tent you're so fat," states Brian Fellows.

"...yeah WHATVEVER," exclaims Boniffa-Lattifa Jackson.
by Corey A. Chestnut January 19, 2005