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A female from the age of 18 upwards (or in some cases a male) who has an unnatural, creepy and quite frankly unhealthy obsession with canadian singer Justin Bieber. It can also refer to someone who is crazy enough to listen to his music.
Female A: Hey I went out and bought like 10 copies of the new Justin Bieber album.

Rational Thinking Male: You are such a bieberphile
by Ashton J Brown April 10, 2010
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An adult who likes the music of Justin Beiber, a play on the term paedophile
Person 1Dude I just love Bieber

Person 2But your 35

Person 1Yeah so what

Person 2Your such a Bieberphile
by owzDevil December 27, 2010
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