A sexual position in which a man covers his dick in curry before giving it to the woman in every orifice of her body. Usually done with a HUGE slut.
"Yo dude, what did you do wit dat bitch last night?"
"Oh man, I totally gave her a Screwhana. She had jizz runnin' out her nose and ears and shit. Then she started cryin', so I had to cockslap her and tell that bitch to shut up."