When you cut a fart while taking a shower with water running through your ass crack and it makes the sound of a duck quack. Quack farts often smell worse than regular farts.
I let a quack fart slip while my girlfriend was in the shower with me and she bolted.
by madskills69 July 13, 2010
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Quacking farts are flatulence which sounds like a duck.
Dr. F. wondered if the student had a duck up his ass due to the quacking farts he heard.
by I, Wreckerrr October 09, 2016
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