The Justin Bieber 

When two guys cum in each other's mouths and try to sing like a girl.

I gave this really attractive guy that looked like a girl the Justin Bieber.

The Justin Bieber by Diry Ry November 5, 2010

who the f*** is justin bieber 

famous phrase told by wise metal singer Ozzy Osbourne into an interview in 2010

The Host : What music are you listening now? Do you listen to any music
*Ozzy speaks on his english*
The host : So you are listen a lot of Justin Bieber
Ozzy : Who?
The host : Justin Bieber
Ozzy : Who the f*** is Justin Bieber

who the f*** is justin bieber by sobry November 15, 2016

The Justin Beiber Effect

When a song or other business extension is used by Justin Beiber, and subsequently ruins it.

Justin Beiber announces Dubstep track, therefore, ruining most dub step for some people, subsequently 'The Justin Beiber Effect'

The Justin Beiber Effect by Jsee December 13, 2012