When you take a dump in a toilets tank
Dude: im going to take an upper decker in burger kings toilet.

(Dude upper decks BK)
Later someone takes a piss and flushes toilet: what the!
by mountain high mush September 13, 2014
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A Decker is a ginger-haired person with a simple comb-over.
This person is loving, forgiving, and cool for the most part.
Back in school, a Decker would study little, but still somehow manage to get almost straight A’s.

A Decker lets few people into their heart. But those people are the most loyal, trustworthy, and funny friends a person could ever have.
Dude, this Decker Guy is so cool!”
by xX_Boss_Xx November 29, 2017
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In the bookTHEY BOTH DIE AT THE END’ the word Decker is used to describe someone dying that same day
Mateo: Rufus and I are Deckers.

Woman: Sorry to lose you both today.
by softseaveyy October 13, 2021
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A dude sits atop the toilet tank and craps in it, facing forward. A woman (or man, I guess...) sits on the toilet backwards and also crals as s/he performs oral sex on the guy seated atop the tank.
What were you two doing in the bathroom so long?
I expelled every fluid imaginable thanks to getting an upper-decker double blumpkin.
by Terry O'Raynis April 4, 2023
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