Top Definition
(Adjective) When something is just so unbelievably, extroardinary, or remarkably gay, you have no other option but to reference the Bieber.
Friend 1- My guy friend made out with a dude last night!
Friend 2- WTF. That's unbeliebable!

Friend 1- My boyfriend and I are going to a Ricky Martin concert.
Friend 2- That's UNBELIEBABLE!

song remix: You're unbeliebable!!! Uh duh duh du nuh nuh nuh, unbeliebable!!!!
by INLOWSOUTHIGH April 16, 2011

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