When you’re so horny but you also gotta take a poop, so for some odd reason you decide to poop inside the top part of the toilet then blow a load on top of it.
My girl had me so hot but so did that Taco Bell, I had no choice but to pop off the toilet lid and drop off a double decker.
by TacoBangBang March 7, 2021

When a man and a women, a man and a man, or a women and a women, lay on top of each other and either fuck, or finger each other
by Backseat Flat Stanleys January 31, 2017

While taking a duece you realize you need to puke. You cannot reposition yourself so you puke while duecing, therefore you are flowing from both floors, the double decker.
by Jon S. April 19, 2004

The party was mortified when they discovered Steve had landed a Double Decker on Shannons shame.
Double Decking
Bismark
Double Decking
Bismark
by Fresco Wisdom August 6, 2011

n. An act involving two people pooping at once whereby the first person sits on the toilet seat and the second straddles the bowl while sitting on the first person's lap.
by Matty Scat August 13, 2006

by sune3000 April 14, 2006

by Score!! February 25, 2019
