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.
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.
by yigs94 October 23, 2011

The "cock block" for the female. When a girl is effectively cock blocked she has been beaver dammed.
by jennyjustjenny December 20, 2012

by Cherryontop44 February 22, 2017

When you're pressed up against your woman in the shower and the water flow causes a dam of water to form between her breasts
by The Real Shocky March 30, 2015

v. to make a serious face in order to make it seem like you're sober when you clearly are not. especially when cops are present.
by jerseygirl609 January 14, 2008

by Ed the Shred June 7, 2016

A flood through the lower G.I. tract/colon after the constipation/blockage breaks free. See assplosion
I had notshitin a week but the greasy breakfast and large pot of coffee this AM sparked a messy dam break by mid AM.
by Sauceman January 12, 2005
