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
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.
I'd give it a 4 on the Bieber scale.
by Darwin Bonaparte June 01, 2010
Like a weiner only smaller.

A very small penis.

Named in honour of popular singer Justin Bieber, a small weiner believed by many to have an extremely small penis.
Q: I heard Justin Bieber's weiner is just a bieber. Can that be true?

A: Yes indeed: modern science has shown it to be negligibly small.
by Pipe Downn November 12, 2010
a synonym to the word gay.
I just sucked a dick, I am a total bieber
by klik_N64 August 27, 2010
Common name given to a grown man who texts, emails and talks in a manner much more suited to 12 year old girls. Often attempts to cover this persona by claiming fictional relations with maternal entities of known associates.
"What's the moron's name that always ends his emails with those dumb smiley faces?"

"Oh, you mean Bieber?"
"Yeah that's him, he just sent another reference about my mom, then signed it with a smiley face. That sure was funny when I was not quite yet a teenager."
by Vice Cap'n Berry August 19, 2013
A person who usually sings too much and talk like a girl. Someone who think he is talented but only have a micropenis. See Edward Cullen. But shouldn't sparkle... or drink blood.
"I feel incredibly bieber today!"
"That guy is the biebest ever!''
by biebest January 23, 2013
The most humiliating put-down for being a whiney bitch or pussy that should almost always provoke a reaction of compliance.
Hey man I just got out of work, let's go get some beers!
-"I can't dude, I have to wake up early tomorrow"
Stop being such a fucking Bieber and meet me at Sully's.
-"Fuck you dude... I'll be there in an hour."
by American Cousin July 08, 2012

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