Upper Decker Double Blumpkin 

When a man is taking a dump in the tank of a toilet while a female is sitting on the bowl taking a dump while facing him and performing oral sex on him.

Yo I was taking a shit and Tracy want to give me a blumpkin but she also had to take a shit so we did an Upper Decker Double Blumpkin

Upper Decker Double Blumpkin by Roger Podacter September 19, 2010

Upper Decker Demolator

The act of filling the top reservoir of someones toilet with liquid feces. Preferably, after the mass consumption of spicy foods such as vindaloo or chili.

Oh my god, an Upper Decker Demolator! I keep flushing and it keeps coming back!! Ok, you keep flushing, I'm going for more bleach. And some mints, in case you have to siphon it out...

Upper Decker Demolator by dissy614 January 23, 2009

Upper Decker Double Blumpkin 

The very intimate act in which the male lover delicately removes the top cover on the porcelain tank of a toilet. Next he will mount the the tank and begin to defecate. Now the female lover gently sits on the toilet seat facing her male partner. The act begins when she also compenses to defecate while orally accepting his genitalia.

I knew she was the ONE when she pulled me into the hotel bathroom and introduced me the amazing upper decker double blumpkin.

Upper Decker Double Blumpkin by INFDOC September 9, 2021

Upper decker dry docker

its where you turn off the water on the toilet before someone takes a poop and you take a diarrhea in the upper water chamber. Then when a person sits down to take a poo, it lands on the porcelain and sticks, then when they go to flush it shoots diarrhea out. causing a horrible situation

Man that was funny when billy gave her the old “Upper decker dry docker”, her trailer smelled like feces for months.

Upper decker dry docker by jdunz July 20, 2022

Upper Decker Pecker Wrecker

When you pack a fat lip of chewing tobacco in your upper lip and give a blow job. The tingle of the nicotine on the cock wrecks ur pecker, hence the upper decker pecker wrecker.

My girlfriend gave me an upper decker pecker wrecker the other day and I’m still buzzin.

Upper Decker Pecker Wrecker by Maxregan6969 March 30, 2023

Upper decker delux 

The act of sharting in public and then taking your shit pasted underwear off and disposing of it in the tank of the toilet

Man 1. Boo boo has been gone for awhile

Man 2. He's probably taking a shit

Man 1. He farted before he left so likely

Person in question....we need to leave

Later admits he put his shitty underpants in the tank of the toilet of a public setting to avoid being embrassed

Now their shit covered under pants are worse then discovering actual shit in the tank

The upper decker delux

Upper decker delux by Takindumps4200 June 28, 2022

Upper Decker Double Blumpkin' 

An event when two couples receive phalacio while defecating in the bowl and in the tank.

"Yo Dawg, did you hear Shaniqua was in a Upper Decker Double Blumpkin' last night?'

Upper Decker Double Blumpkin' by mrButters April 23, 2009