Double-decker, or to pull a double-decker, is when a girl is having sex with two men, whereas one is thrusting his manhood in her ass, and the other man is penetrating her vagina. Often done to completely dominate the woman, and/or a symbol of the friendship between two men.
by Christopher Marrow May 12, 2008
To leave an Upper Decker in the toilet tank, and to leave a Floater in the bowl. This can either be a two-man job, or performed by a single person who breaks his payload into two segments. The result is that the water in the bowl will be brown, and the water that comes from the tank during a flush will also be brown.
by inmatarian February 04, 2008
When you take a deuce in the upper tank of the toilet. Leaving the owners to believe the toilet is broken, since the water comes out brown and pieces of fieces. This continues until someone either scoops it out of the upper tank or it dissolves.
Usually happens at mad crazy house parties or when someone mad dogs another person and allows them to use their bathroom.
by Tony April 21, 2004
When you sit on your homie’s shoulders with your nuts in his face and shit through the space in between his legs.
by lads9 September 09, 2018
Taking a crap in the upper part of a toilet, then in the bowl, forcing the owner to flush in dismay, and in stench.
by Atømicfly January 01, 2005
The act of taking a shit while another is sitting on your lap and shitting simultaneously between your legs.
Perry and Carl both had to shit but only one toilet was available so they performed a double decker.
by gvanasse32 February 26, 2013
by fordham2010 March 11, 2010