Top definition
A brewing fart is a fart that is in your body about to be fart.
( A fart being made in the process)

" Sarah I have a fart brewing ! " Kaitlyn M said. " EWW Kaitlyn you always have a brewing fart ! " Sarah replied to kaitlyn who farts alot and tells people
by Annonymous Saroo. January 11, 2009
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