A two headed, Six legged dog which is formed by 2 dogs having sex and moving around as one dog.
Look at that Double Decker Dog go
by Noddog June 20, 2011
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the act of a male individual shitting or pooping in the upper deck of the toilet while a girl goes down on you (aka; sucking your penis), while she releases poop out of her butthole into the lower deck bowl of the toilet.
Jeff to Randy: Dude, bro, Jerry definitely just got some of that double decker blumpkin action dome piece from that random B with the STDs.
Randy to Jeff: Real nice, real fuckin' nice.
by Lambeaux + Jerry November 9, 2008
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When someone is doing an upper decker and the person on the lower decker is is giving head and takeing a shit at the same time.
I walked into two people doing a Double Decker Blumpkin in your bathroom.
by sick mo'fo December 7, 2012
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Shelbe: can I borrow your double decker biscuit I need inspiration for my art project
Isabella: I ate it
by Ktvtjvtivtiv October 5, 2017
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The act of taking two perverts, preferably of the same sex, and laying them on top of eachother while tying their arms and legs together and letting them do as they please.
Trade marked by Tyler Coley™️
tonight me and my girl/boy friend are going to do a new position, the double-decker whore
by Ty.Coley November 9, 2018
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A sandwhich that has three pieces of bread and two layers of filling.

Bread
Filling
Bread

Filling
Bread
A Double decker sandwhich has three pieces of bread and two layers of filling.

Bread
Filling
Bread
Filling
Bread
by tilley123456 January 4, 2014
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a rather, obscurely large penis. it usually has the size of about 5 double-decker buses. double decker dicks are uncommon, though some males have one much similar. for an example, brown's big wanger.
person: hey, did you see that double decker dick on the news?
person 2: yeah! it was so massive! but not as big as brown's big wanger.
by dabmaster11037 December 18, 2019
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