When you come on someone's face, (or inside their mouth) and the cum dries around the rim of the mouth or lips.
Stephen Colbert: "Oh! I see. I guess man whores should have to drink from a separate water fountain. Actually, that's probably a pretty good idea. Might have a case of the 'lip crispies'"
Another word for herpes.
"I banged that she-male the other night and woke up with lip crispies!"