Beiber dam 

1. a mob of brain dead teenagers lining up to see a Justin Beiber concert.

2. what most people say when Beiber's music comes on a nearby radio.

Beiber, dam... turn that crap off! Jesus!, look at that Beiber Dam over there at the fairgrounds.

Beiber dam by Fotofly November 30, 2010

Bieber Dam 

A Bieber Dam is when a large horde of Justin Bieber fans block entrys, doors, halls, roads etc. similiar to a beaver dam.

John: Hey I think Justin Bieber's signing autographs in the mall food court today
Sam: Ya he is, did you see the size of that Bieber dam? no one can get through to the other side of the mall.

Bieber Dam by yigs94 October 23, 2011

Bieber Dammed 

The equivalent of a Rick Roll on YouTube, but with a Justin Bieber video, instead of Rick Astley.

Can also happen on torrent when you think you are downloading a James Bond movie called "Never Say Never" and then find out it's a Justin Bieber movie.

Not again! I clicked on this video for the iPhone 5 preview, and I was Bieber Dammed !

Bieber Dammed by Vapor S. Thompson March 14, 2011