Top Definition
Acronym for "What's the big idea?" Soon to replace the old and overused "WTF."

Can also be said "WTI" for simply "What's the idea?"

Originated from the Three Stooges short films.
Hey man, I hit u and u didnt die!!111 WTBI????!?!?!/?//11
作者 Phoojoeniam 2004年1月08日
3 Words related to WTBI


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