A stain of semen, blood,
food, ect. on the clothes or belonging of a skank, slut, whore, hooker, ect.
Usually a whore stain can happen at anytime, during sex, eating (sometimes can be sexual, like if she/he is
fat), rape, bjs (whore stain on the mouth), anywhere a
cock has touched the outside/inside of her/his
body, ect.
Or a whore stain can happen during examination of a dead hooker body, when the investigators use that light thingy over their body that shows semen, blood, stains...
Or during sex with various people, or person if you do
one after the other.