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!