paint roller
When you take your giant sausage and smear it all over someone's face like they're a canvas, using either blood, guts, or the mess from their last meal. You can even mix in some cum if you first dump it into a tray and roll around in it like a maniac.
He painted my face with his finger after I told him he smelled like a trash can.
She used her period blood to paint his face during the school talent show.
He rolled around in a tray of cum before slapping it on his girlfriend's face.