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.
by Christopher Marrow May 12, 2008

Since Roddy wasn't able to make it to our planned threesome with him, me, and his girlfriend, I just got a strap-on and Double Deckered her.
by MoosyPoo April 14, 2010

double decker is the act of shitting in the bowl of a toilet whilst a friend or accomplice upper deckers the same toilet
by Tits VanCockslap May 15, 2014

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
I never touched her, we did a double decker
by dategrape December 11, 2010

by Adam Smirti June 7, 2007

When you are taking a shit in the upper tank, she's giving you a blumpkin while taking a shit in the bowl.
by The Jake Bush a.k.a. Switch March 30, 2009

by MyDefinitionsBeTROLLIN October 22, 2022
