• 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.


    Upperdecker meaning & definition 1 of Upperdecker.


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

    Upperdecker meaning & definition 2 of 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 dont like the host/hostess.

    Upperdecker meaning & definition 3 of Upperdecker.

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