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 03, 2010
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 02, 2007
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 12, 2005

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