skid mark 

an elongated stain in the rear of one's underwear caused by one of the following: 1)rubbing of the underwear on an insufficiently wiped anus after excrementing 2)expelling juicy farts (butt cheese) into the underwear over an extended period.

"I think my underwear has a skid mark from farting all day"

skid mark by Uncle Stinky May 7, 2004

Skid Mark 

When someone does not wipe all the poopies out of there butt after a shit and it stains there underwear.

Kiersten : Oh Chad let's get naked and Fuck! Fuck! Fuck!
Chad : Oh baby you don't have to tell me that twice!!!
Kiersten : Oh that's gross you have Skid Marks on your undies!
Chad : Yeah I had Mexican for lunch and been shitin all day can't seem to get all the poop wiped out!
Kiersten : Uh go take A shower or no fucky!
Chad : Maybe you can join me and scrub all the poopies out for me!
Kiersten : Uh Go Fuck Yourself!

Skid Mark by SlopNChop May 11, 2017

skid mark 

A fecal stain that is visible on one's undergarments.

Also presents in a less structural (and lesser known) form, typically developed from excessive "dry farting". In this form, the skidmark develops in a larger region, yet its definition is not as clear. Essentially, it is representative of a consistent gaseous pounding of one's underpants over a long period of time, and while fairly rare, is unmistakable. Usually, this effect is understandable to about 1/10th of all humans.

I just ran a red light and blasted a massive skid mark all over my BVD's.

skid mark by A. Boyd January 13, 2007

skid mark 

n. Poo poo stain in the seat of one's underpants.

I don't wipe; I've learned to live with the skid mark.

skid mark by The Grammar Nazi December 19, 2001

Skid Mark 

**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

**Dude, did you just shit your pants? You are going to have major skid marks.

**What color where these when you originally bought them?

Skid Mark by Ogrenator April 10, 2008

SKID MARK 

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.

Q: Honey, have you noticed that Jessica's husband is really worthless?

A: Yeah Jessica's husband is a skid mark in our world's collective underwear because he is an absolute pile of shit and contributes absolutely nothing to society except for being a big ole shit stain.

SKID MARK by FUNNY GUY 77 July 17, 2011

skid mark 

an unclean brownish mark on one's underpants

If you would just wipe yourself properly you wouldn't have to deal with a skid mark every time you pulled your pants down.

skid mark by Light Joker April 9, 2006