Adjective. A person is attractive enough to warrant printing out a copy of their picture, masturbating to it, and in spraying it with ejaculate stain the image beyond all recognition. In rare cases the individual being stained may be so stainable that the ruined pictures are gathered, proffesionally bound, and kept for sunday afternoon parousing.
Oh my god, check out the snoods on that bitch over there.
Jesus christ, she's stainable!