Upper Decker

When someone poops in the top part of a toilet, (the part that you have to take the top off) so when someone else goes to the bathroom and flushes the toilet instead of clean water coming in and filling the toilet, shit water comes in. This is done as a pratical joke, usually done at parties.

Guy 1:Hey I just did that Upper Decker in the toilet upstairs and Jennifer went in there.
Guy 2:Hahahah, what'd she do when she came out?
Guy 1:I don't know, she's still in there!

by Kevinnnnnnnnnn December 26, 2009

Double Decker

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 25, 2013

upper decker

the act of deficating in the water tank of someones restroom, so when they flush, out comes muddy madness

i just left an upper decker in that starbucks bathroom!

by darby krow February 13, 2010

Double Decker

When someone takes a dump with someone on their lap

I took a double decker with Sally today

by fordham2010 March 11, 2010

Double Decker

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

Roommates Ezekiel and Jebediah both consumed too many matzah balls and were locked in a heated stand-off over who may use the toilet first. They decided to compromise and perform a DOUBLE DECKER.

by PapaPete September 29, 2011

Upper Decker

When you go in the TOP tank of the toilet. Best used at a party or with an audience.

Aw, man! Someone pulled an upper decker!

by Goldgoatturd February 20, 2009

lower decker

The opposite of the upper decker, which involves leaving a fresh pile of feces on the floor next to the toilet, but none actually in the toilet. The lower decker can be used in many situations, such as the workplace or enemies homes.

"Dude, I totally did a lower decker in the men's bathroom."

by simechkr May 12, 2006