Double Decker 

When a man puts on a strap-on above his cock and double penetrates a woman.

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.

Double Decker by MoosyPoo April 14, 2010

Double Decker 

double decker is the act of shitting in the bowl of a toilet whilst a friend or accomplice upper deckers the same toilet

I just double deckered the toilet in the master bedroom with simon!

Double Decker by Tits VanCockslap May 15, 2014

double decker 

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

double decker by dategrape December 11, 2010

Double Decker 

The act of merging a buffalo pizza slice with a bbq pizza slice

Man did you see solow take down that double decker.

Double Decker by Adam Smirti June 7, 2007

Double Decker 

When you are taking a shit in the upper tank, she's giving you a blumpkin while taking a shit in the bowl.

Daisy and I performed a double decker at the party last night

Double Decker by The Jake Bush a.k.a. Switch March 30, 2009

Double Decker  

The double decker is a combination of the upper decker and a blumpkin. The guy is on the top tank performing an upper decker while the girl faces the wall with her feet on the toilet seat giving him a blumpkin while she drops a deuce in the bottom tank

Double Decker The bitch pissed me off so in her bathroom i gave her sister a Double Decker

Double Decker by tnfungi January 14, 2009

Double decker 

When taking a shit, having someone sit on your lap aiming their anus between the first person's legs. Both people shit at the same time, creating a "double" effect and saving water in the process. For utmost efficiency, time the splashes similar to Olympic synchronized diving.

She sat on my lap while I was on the toilet so we could double decker that shit.

Double decker by iAM December 14, 2013