Similar to the Upper Decker, the Double Decker involves taking a shit in the victim’s toilet, not flushing, then repeating the process in the tank. The end result is the unsuspecting victim flushing the lone turd, only to be accosted by a stream of liquid feces into the bowl. This is far beyond an innocent prank, be sure the victim deserves it, as there’s no going back.
Allen was house-sitting for Sam and had a party at his house...he was only caught because somebody left a Double Decker in Sam’s toilet.
by AlienMan1964 February 7, 2018

by Anarcho Crust Fuck April 4, 2020

My boyfriend Alec and I had to do an Ohio Double Decker in our apartment. It was the closest we've ever been
by Grandmista September 21, 2022

The north Florida double decker is when I one gets a DUI and is responsible for an abortion before the age of 18.
Yeah bro Aidan is grounded rn for pulling off a north Florida double decker. Won’t be seeing him for a while.
by FinnS726 January 25, 2021

When two people have to poop simultaneously, so one person sits the the lap of another while facing each other on the toilet. If it’s a boy and girl and they are having vaginal intercourse while double decking, it’s called docking the buses.
Yesterday my bro and I had to both poo, but the spare bathroom was close. We ended up doing a double decker, luckily the bowl didn’t fill up.
My girl and I had to drop a deuce so we double decked. She’s got them big boobs though, so after a minute we docked the buses ;)
My girl and I had to drop a deuce so we double decked. She’s got them big boobs though, so after a minute we docked the buses ;)
by MelonLord95 April 9, 2022

Performing a European Double-Decker involves a male and female deficating in the bowl and resevoir (respectively) with the male straddling the resevoir, thus giving him access to perform cunnilingus on the female.
Brad and Angela just got back from a European Double-Decker in the bathroom. You can tell by his white mustache and brown soul patch.
by Ninjow June 17, 2021

A dude sits atop the toilet tank and craps in it, facing forward. A woman (or man, I guess...) sits on the toilet backwards and also crals as s/he performs oral sex on the guy seated atop the tank.
What were you two doing in the bathroom so long?
I expelled every fluid imaginable thanks to getting an upper-decker double blumpkin.
I expelled every fluid imaginable thanks to getting an upper-decker double blumpkin.
by Terry O'Raynis April 4, 2023
