Skidmarks

[DaveW]

That's basically a poop

[messyjean]

I would say, it's a shart!

[vincp40]

That's basically a poop

I would call it poop, not a poop
It's what can remain after a poop if you don't wipe.

[tidbgrr]

You say her panties get that way at work. What about away from work like on the weekends. Does she get skidmarks then? Have you known any other girl who gets skidmarks in their panties?

[messyjean]

is she often wearing tight jeans that goes deeply between her buttocks?