Top Definition
A douchebag who tries way to hard to look like the singer and performer "Justin Beiber".
He's such a Wanna beiber its not even funny.
by John dough yo November 29, 2010
Someone who acts liek or "wnts to be" Justin Beiber
Kid walks in with a comeover and a pre-pubescent voice... "Man that kid is a wannabeiber"
by xxilyxx378 July 02, 2010
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