a line of shit in underwear, a toilet, or sometimes even walls. it is usually dry, but varies in viscosity, it resembles the skidmarks from a car.

encrusted or soft fecal forget-me-nots that are transferred from your anal paintbrush to your underware canvas.

When soft, still plyable anal dischanrges rub so close to the offenders' undergarments that a fecal stain is left behind. May also occur when the issue is "forced." I.E. Butt picking, massaging of anal irritations, or sloppy wiping techniques. See also "streaks."

**Marks on your underwear left by shit, usually permanent. Caused by Sharting (A fart that turns out to be a shit), also caused by photo finish shits, juicy farts, not wiping completely, and most generally crapping your pants.
**Side effect- buying dozens upon dozens of new pairs of underwear.
**Interesting Fact**
Skid Marks are the most permanent thing on this Earth, no matter how much you scrub they stay. No matter how much bleach you dump on your underwear it doesn't even fade.
**Synonym- Racing Stripes

The stain on ones undergarments left after an explosive anal emission.

A worthless pile of shit that contributes absolutely nothing to society and is merely a skid mark in our world's collective underwear. A non educated pile of shit that is a con artist specializing in fucking people out of there hard earned money by making them take it up the ass like a rump ranger or butt pirate. A man that leaves his family because the going got tough and he runs away with his small dick tucked between his legs like a pussy because he can't man up to responsibility hence he is nothing more than a skid mark to anybody he associates with.

an unclean brownish mark on one's underpants