One participant is sitting on the upper deck of a Toto Toilet while your partner is sitting on the lower deck; with the seat warmer on and the water blasting against their genitals. The upper decker is receiving Fellatio while both parties are passing a Cleveland steamer.
Guy 1: Gawd! Julia is such a basic bitch, i cannot stand her.

Guy 2: Sure, but at least her parents are rich enough to afford a Toto Toilet.

Guy 1: So?

Guy 2: She totally gave me a Steamy Upper Decker, Double wet Blumpkin
Guy 1: Legendary!
by Throbbin-Rockin-Rod January 24, 2018
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The act of, in this very exact particular order: finding a sexual partner and take them to eat a substantial amount of Taco Bell with you. When you both inevitably need to take a diarrhea shit, do it at the same time, with the submissive sitting on the bowl and the dominant sitting on the opened top tank. During the shit, the submissive will perform oral sex on the dominant. When the dominant finishes on the submissive’s face, they must punch the submissive in the nose to create a mixed fluid of blood and ejaculate on their face. Once both parties complete their shit. They will perform a reverse sixty nine on each other until both anuses are clean. Then the dominant must lick the submissive’s face clean.
Man 1: hey bro, why did you break up with your girlfriend? She seemed really nice.
Man 2: nah bro, she was so selfish, she wouldn’t even do a kentucky jelly doighnut upper decker double blumpkin supreme with me!
Man 1: oh man, I didn’t know that, what a selfish bitch!
by Dr. Heinz Doof August 29, 2021
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Double-decker

To fold ones erection back on itself then reinsert to continue coitus.
I totally double-deckered my girlfriend/boyfriend last night.
by Stephan Noir February 04, 2021
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so this bastard took a double decker, and loaded it with cheese. crazy
"Hey, take a look at this double decker cheese loaded bastard. He's afraid of the imminent heat death of the universe, what a loser." *skateboards away*
by 6aXL September 30, 2020
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double decker

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"
by Kelsey15 March 20, 2014
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Double Decker

The act defacating twice in 1 day.
by ROBOPANDA May 07, 2011
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When you want her to go make a sandwich but she still believes in communism.
Girl: I think your argument is invalid.
Guy: Well go make yourself a double decker.
by bonelesspizza January 29, 2017
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