Topal Fart
Is the fart that leaves the brown stain on your tighty whities.
In the 80s Topal toothpaste had a commercial where a man blew cigarette smoke through a cheesecloth leaving a brown stain. This stain was eerily similar to the stain left on your drawers by a good solid case of flatulence. Uh, oh...I just had a Topal Fart.