A very small penis, around 3 inches or less in length and circumference, like Justin Biebers penis.
Girl: "I was gonna give my new boyfriend a blowjob last night, but pulled down his pants and saw that he had a Bieber. I laughed and broke up with him immediately."
by bieberhasnoballs May 23, 2010
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A unit of measurement used to gauge the level of discomfort caused by hemorroids. Each unit is roughly equivalent to the pain and discomfort of watching a Justin Bieber video.
by Darwin Bonaparte June 01, 2010
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The act of throwing up because something is so horrendous.
If you've ever seen Jersey Shore, then you've probably Bieber'd or have come very close to Bieber'n.
by Zuthner March 02, 2011
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The worst insult in the history of worst insults!
Guy 1: I just broke up with my girlfriend...

Guy 2: Dude... you're such a Bieber...

Guy 1: Dude... we're done... that was mean, man...
by Meisamazingbejealous October 11, 2011
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A boy of zero talents.
Alex: That boy can't do squat.
Alexis: Yeah, he must be Bieber.
by Sophis March 05, 2011
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1. The physical embodiment of all that is gay, fake and weak.

2. A male that will never reach puberty, not even with testosterone therapy. Thus having underdeveloped balls indefinitely.

3. A fag who should of just stuck to being a quire boy.
1. I can't believe you went and got fudge-packed, You are such a Bieber!

2. That kid turned 22 and still didn't hit puberty. It's classic Bieber syndrome.
by TheKegBringer October 17, 2010
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A unit of measurement describing the size of a penis.
1 Bieber = 0.6 inches
by SUPA FUG DUP May 24, 2014
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