The act of taking a shit while another is sitting on your lap and shitting simultaneously between your legs.
Perry and Carl both had to shit but only one toilet was available so they performed a double decker.
بواسطة gvanasse32 فبراير 25, 2013
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.
بواسطة MoosyPoo ابريل 13, 2010
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.
بواسطة iAM ديسمبر 14, 2013
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
بواسطة dategrape ديسمبر 9, 2010
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!
بواسطة Tits VanCockslap ابريل 3, 2014
When a person stacks one fist on the other, and aggressively shoves them into a woman's vagina.
"I'm still hurting from his double decker last night"
بواسطة Kelsey15 مارس 8, 2014
One Bro Gets a blowjob while the girl is on all fours on the ground. While this is happening, another Bro gives it to the girl from behind. Both Bro's preceed to run forwards until the girl is bent in half. Then she makes both Bro's a sandwich.
-"dude she's in the hospital!"

-"Yea i know, after we double-deckered her, she made us sandwichs, then we told her to walk to the hospital."
بواسطة Bro Bro Bro Bro Bro ديسمبر 11, 2010

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