Top definition
1.) a man or woman obsessed with The Biebs.

2.) A young woman usually between ages 18-25 who has an irrational love for under-aged male pop singers, i.e Justin Bieber.
That girl in our math class is such a Biebernaut.
by The Anti-Biebernaut February 20, 2011
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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