A special kind of fart which actually carries anal juices with it upon exit, thus causing greater casualties from the resulting linger. May cause your ass cheeks to slip and slide as you run for the tiolet paper, and will surely leave a mark in your underwear.
Fags get this a lot.
Can also be used to express your feelings
Jerry: "relax, it was just a wet-fart."
Tom: "oh. pass the funions."
People with large anuses do these type of farts alot.