bisto fart

An extremely unpleasant fart that "browns", "seasons" and " thickens" all in one.

A bisto fart is a fart that stains ones underwear like gravy granules, gets stronger in smell and thickens the air as it matures to full strength. A bisto kid is one who enjoys the smell of a bisto fart

by rob Hogarth December 09, 2007