Any drippy, chalky, paisty, gooey, or
sticky reminants of a young
slut's existance that happens to get rubbed, smeared, excreited, or
spit onto your person or belongings by way of interaction with said slut; voluntary or involuntary.
Guy #1:
Dude, what's that mark down the side of your jacket? It looks
like makeup.
Guy #2: Yeah, it's kittie schmear from my date last night.