Double Decker

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.

Taking a crap in the upper part of a toilet, then in the bowl, forcing the owner to flush in dismay, and in stench.

The act of taking a shit while another is sitting on your lap and shitting simultaneously between your legs.

When someone takes a dump with someone on their lap

The act of sitting in ones lap while he or she is sitting on the toilet. The individual on bottom produces excrement into the bowl of the toilet while the individual on top produces excrement between the bottom individual's legs thereby creating the "upper" portion of the deck.

*Often confused with an UPPER DECKER, in which one individual produces excrement into the upper tank of the toilet.*

*See also: Upper Double Decker

When a man puts on a strap-on above his cock and double penetrates a woman.

double decker is the act of shitting in the bowl of a toilet whilst a friend or accomplice upper deckers the same toilet