upperdecker 

An upperdecker is when you poop in the toilet tank of someones bathroom, its the gift that keeps on giving

i was at this party and they tried to kick me out so i gave them an upperdecker

upperdecker by Nick June 18, 2006

UPPERDECKER 

The upperdecker is a prank that you can pull on a friend or loved one, or more likely someone who deserves it. An upperdecker is defined as defecating in the upper tank of a toilet, allowing it to fester for as long as possible and sending a chilling brown residue into the bowl upon each flush.

At a party where they run out of beer one might like to leave an "upperdecker" to show their disapproval.

UPPERDECKER by Grant Herman August 31, 2004

upperdecker 

A vengeful act of defacating in the tank of a toilet so as to odorize the bathroom with every flush for weeks until found. This is usually done at parties where you don't like the host/hostess.

"everytime I flush the toilet my bathroom wreaks, someone must have left an upperdecker, when I said the parties over go home..OH man! they did."

upperdecker by troy garner September 21, 2005

upperdecker 

When you shit in someone’s toilet tank. To pull one at a lame party, first eat everything there that doesn’t agree with you. Then go into the bathroom, remove the lid from the toilet, squat over the tank, and release the explosive diarrhea that has surely built up by now. When you are finished, the water in the tank should be brown, and have dozens of lumps of shit in it. Then wipe your ass, putting the used toilet paper in the tank, replace the lid, and leave the party, or stick around to watch the fireworks.

This party is dumb, i’m gonna drop a mad upperdecker on this place.

upperdecker by curlypoo December 24, 2020

upperdecker 

To take a Duce in the upper part of a toilet.

Dude I just took a upperdecker in McDonnells.

upperdecker by anal anilllater April 15, 2011

Upperdecker 

When you put you're dip behind the top lip instead of the bottom

I prefer a upperdecker with my dip.

Upperdecker by CaptainIan August 3, 2019

upperdecker 007

The act of taking a shit on wax paper, wrapping it up and putting it in the freezer until solid frozen. Then using the frozen turd as a time delay shit bomb, drop it in the upper tank of a toilette. The Shit Agent will have time to escape and the results won’t happen until hours after he is long gone. Once the shit thaws and someone flushes the toilette, it will fill the bowl with brown water and mission is complete.

I was over Jill’s house and she had a couple people over . I wanted to upperdecker her toilette but didn’t want to get caught. Since I have mad spy skills I used some frozen shit I stashed in her deep freezer and upperdecker 007’d her toilette , giving me plenty of time between the time I left and when Allyson went in and flushed it.

upperdecker 007 by Stephen Roche October 23, 2017