The sound of a particular fart caused by overly compressed butt cheeks. This will occur due to the person attempting to slip out a silent squeaker so as not to draw attention to his or herself. Odds are a quack-like sound will result from this expulsion. There will always be at least one person who will notice and call you out immediately.
Wow, dude! Did ya step on a duck? Nice one!
by Jersey Quacker August 2, 2007
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An extremely loud that makes your butthole explode and rumble, and when it comes out it sounds like you accidentally stepped on a duck and it screamed. Usually happens when you hold a fart until you can't hold it anymore.
Bruno: *hardly and loudly farts*
Reese: "Yo Bruno, what did ya just step on a duck?!"
Bruno: "Yeah, and it feels like my ass ripped in half."
Reese: "Pull yourself together, dude."
by kylekkckckkckc May 3, 2010
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A really loud, smelly fart that almost sounds like a quack.
WHOA...who stepped on a duck?! It fuckin' stinks in here!
by staccato brainstem February 13, 2005
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To guff, fart, break wind or quack
Jesus dude, that must have ripped your ass..sounded like u just stepped on a duck!
by ShavenLunatic October 31, 2003
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the fart that comes out making a "QUACK" noise
ummm hortense? did u step on a duck?
no... it was yo momma!
by Neo December 25, 2003
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This is something that you say when someone passes gas audibly. It refers to the similarity of a farting sound to the quacking sound made by a duck.

In some cases, this expression is used by the farter to comically deflect the embarassment. In other cases, it is used by a bystander to comically point out the fart to the general public.
by GangerDay July 27, 2010
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A spirit duck is crushed when a person passes gas (farts, toots, etc). It quacks but the duck itself cannot be seen because it's a spirit duck. An important distinction from "stepped on a duck"
(Person makes a loud fart). "Oops, I just stepped on a spirit duck."
by brandsilence September 20, 2011
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