A slang that can be used when one takes a massive dump. The term is a play on words based on the Spanish dance called the pasodoble and was invented because of the TV show Dancing With the Stars.
TV:.... and here are Jason & Edyta dancing the pasodoble.
Person1: Man I gotta go pass-a-doble...
Person1: I gotta take a dump... pass a doble, doble referring to the massive brick of shit that is about to be passed out of my ass.
Person1: Man that was not a doble, it was diarrhea.
Person2: so it was a liqui-doble?