A bowel movement that was produced on top of another bowel movement.
The party was mortified when they discovered Steve had landed a Double Decker on Shannons shame.

Double Decking
Bismark
by Fresco Wisdom August 6, 2011
Get the Double Decker mug.
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.
In order so save water, we did a double decker.
by Matty Scat August 13, 2006
Get the Double Decker mug.
When you take a deuce in the upper tank of the toilet. Leaving the owners to believe the toilet is broken, since the water comes out brown and pieces of fieces. This continues until someone either scoops it out of the upper tank or it dissolves.
Usually happens at mad crazy house parties or when someone mad dogs another person and allows them to use their bathroom.
by Tony April 21, 2004
Get the double decker mug.
When you sit on your homie’s shoulders with your nuts in his face and shit through the space in between his legs.
Yo, me and devon dropped a steaming double decker earlier in the church bathroom!
by lads9 September 9, 2018
Get the double decker mug.
Double-decker, or to pull a double-decker, is when a girl is having sex with two men, whereas one is thrusting his manhood in her ass, and the other man is penetrating her vagina. Often done to completely dominate the woman, and/or a symbol of the friendship between two men.
Man Oscar, we have gots to double-decker that Sandra chick, she is too fine.
by Christopher Marrow May 12, 2008
Get the double-decker mug.
a classic taco within a taco: placing a fleshlight inside a woman's vagina, then placing penis inside
I was nervous about performing in foreign territory so i requested a double decker

I never touched her, we did a double decker
by dategrape December 10, 2010
Get the double decker mug.
When a guy takes both fist and shoves them both into a girl's pussy and ass at the same
He did the double decker on me this morning and I'm sore
by MyDefinitionsBeTROLLIN October 23, 2022
Get the The Double Decker mug.