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 08, 2014

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like an upper decker except one shits on the top of the tank lid rather than in the tank
" My boss pissed me off so I snuck into his private bathroom and left him a double decker on his toilet tank."
by Vizualist February 10, 2012

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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."
by Bro Bro Bro Bro Bro December 11, 2010

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U do this to a girl u hate when ur about to climax shove her over and the jizz in ur hand and when she tries to get up shove the jizz in her nose and run away it is called this because u humiliate her twice
Dude I double deckered that bitch yesterday
by Hoddy toddy June 19, 2014

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A bowel movement that was produced on top of another bowel movement.
The party was mortified when they discovered Steve had landed a Double Decker on Shannons shame.

Double Decking
Bismark
by Fresco Wisdom August 06, 2011

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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
by tnfungi January 06, 2009

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Urinating and defecate in the upper portion (tank) of a toilet bowl. Coined on Bitch Slap Radio.
"Man, I hate Miami Beach so much, I'm gonna take a double decker in every toilet there.
by E.D.M. August 13, 2007

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