Similar to the Upper Decker, the Double Decker involves taking a shit in the victim’s toilet, not flushing, then repeating the process in the tank. The end result is the unsuspecting victim flushing the lone turd, only to be accosted by a stream of liquid feces into the bowl. This is far beyond an innocent prank, be sure the victim deserves it, as there’s no going back.
Allen was house-sitting for Sam and had a party at his house...he was only caught because somebody left a Double Decker in Sam’s toilet.
by AlienMan1964 February 7, 2018

by FlomFlom January 18, 2022

Child of their parent’s half-sibling with their other parent’s half-sibling or the child of their mother's maternal half-sibling with mother's paternal half-sibling or the child of their father's maternal half-sibling with father's paternal half-sibling.
My double-half-first cousin is a good person.
by Mr. Jacov November 23, 2019

The Double Black Whammy is considered the negro version of a dick sandwich but when one of the perpetrators falls asleep, the victim (usually white) performs a dick sandwich with a friend, not knowing that The Double Black Whammy even happened.
Gerald: Do you know of the Double Black Whammy.
George: I guess, but it’s just a bunch of coincidences and dick sandwiches. One day I’ll tell you the story of how I dick sandwiched Tyrone last night.
Gerald: Wait? You dick sandwiched Tyrone? His buddy Clyde told me that they dick sandwiched you while you were napping at his place.
George: Oh Shit...
George: I guess, but it’s just a bunch of coincidences and dick sandwiches. One day I’ll tell you the story of how I dick sandwiched Tyrone last night.
Gerald: Wait? You dick sandwiched Tyrone? His buddy Clyde told me that they dick sandwiched you while you were napping at his place.
George: Oh Shit...
by Cyka with no Blyat July 15, 2019

My girl had to go to the bathroom but we fucked anyways which resulted in an unfortunate Texas double barrel misfire.
by Plain ol dumb April 13, 2022

Placing both hands together, then spreading fingers in a Spock-like manner (Live Long and Prosper). The lower 4 fingers are inserted into the anus, the upper four in the vagina, and your two thumbs are busy on the clitoris. The "Double Spock" with thumb action.
by anonystiz May 15, 2016

Its when you respond to either irony or sarcasm with more irony or sarcasm, respectively. More commonly referred to as “playing along.” Double humor, however is more specific than playing along because it may be without the knowledge or consent of one or more parties involved in the “double joke.”
Harry: Amanda, why are you such a whore?!?!?!?
Amanda: Because I like sleeping around!!!
Harry: But that could get you infected with many STD’s!
Amanda: What? …
Harry: That's double humor.
Amanda: Because I like sleeping around!!!
Harry: But that could get you infected with many STD’s!
Amanda: What? …
Harry: That's double humor.
by hadoublery July 10, 2011
