Bieber Beater 

the act of masturbating to a image of the canadian pop star justin Bieber

he did the bieber beater every day to show his love for his idol

Bieber Beater by fidgety2 February 27, 2011

bieber beamer 

Any object used as a projectile with the sole purpose of doing nothing but bodily harm to justin bieber

John: Hey man did you see the video of a water bottle being used as a bieber beamer that hit him in the head

Dave: Yeah, hopefully next time it's a brick with a knife taped to it

bieber beamer by dizzle3131 August 15, 2010