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 3, 2010

upper decker

take a shit in the top of someones toilet (where all the toilet guts are)

Valerie was so drunk she did an upper decker in her friends toilet at the party, and everyone smelt it.

by valere March 14, 2008

upper decker

A long home run ball hit into the upper seats of a baseball stadium.

After I caught an upper decker at Busch Stadium, I went to Dan's house where I left a beefy sewer pickle in the tank of his toilet.

by porknut August 11, 2005

upper decker

To take a shit in the top of the toilet, therefore when the toilet is flushed, brown water washes the poop down.

"That fuckin bitch wouldn't blow me so I am going to leave her an upper decker"

by chops renfer August 22, 2006

upper decker

the act of pooping, in th top resiviour part some someone elses toilet.

I just gave Bills toilet an upper decker.

by Russ151 October 20, 2006

upper decker

When you have a massive deuce that must come out when your at a big party. You remove the top lid to the toilet, and release all the poo into it. When done, put the lid back on, and walk out like nothing happened.

I just put an upper decker in her toilet, HAHA!

There gonna be lookin for that upper decker for weeks,HAHA!

by boiiiiiiiiiiiiiiiiiiiiiiiiiiiie January 17, 2006

upper decker

A modification on the "classic" upper decker. In a public toilet setting (where there are no tanks/commodes), you improvise and shit in the urinal.

When Hank got fired from his job, he pulled an upper decker in the company bathroom.

by David C August 12, 2005