1. A mass of fine poop particles in the atmosphere.
2. Poop vapor condensed on the inside of your butt cheeks after forcing out what you "thought" was a dry fart. This often happens in the car and smells exceptionally bad.
Dude, I was driving home from the all you can eat garlic pizza place when I farted and totally Fart Misted all over the inside of my underwear and cheeks.