Biebstep

When a Justin Bieber song is mixed into a Dubstep Remix

Turn that shit (biebstep) off

Biebstep by <--> September 5, 2010

Biebster 

A hipster of sorts, following Justin Bieber religiously. These individuals are constantly the victims of trolls throughout society. Their love for the Beib is so relentless they persevere and continue "beliebing" anyway.

all Justin Bieber fans are most definitely "Biebsters"

(If confused see above)

Biebster by Wild Dan January 11, 2013