stepped on a duck 

To guff, fart, break wind or quack

Jesus dude, that must have ripped your ass..sounded like u just stepped on a duck!

stepped on a duck by ShavenLunatic October 31, 2003

Stepped on a duck 

Another way of saying that you farted.

Me: Aw, man! Did anyone step on a duck?

I farted but I tried to cover it up with "stepped on a duck."

Stepped on a duck by SuperCatgirl2 October 16, 2018

Stepped on a spirit duck

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."

Stepped on a spirit duck by brandsilence September 20, 2011