Fart Stain Edit Meaning

1.

a stain found in your undies.... like after you have a viscocity fart

i have a fart stain!

2.

A vile and repellant person, such as a yuppie, a soccer mom, a tax collector, a fink, a sycophant, or a back stabber.

This insult goes best with the modifier "little."

Shut yer mouth and stand still, you little fart stain.