When a man decides to surprise a girl with random anal sex. This is usually preformed at parties when a man sneaks up behind a girl, and gets her in the butt. The girl is most likely surprised and will yell something like ,"SHIT MY BUTTHOLE!" Or maybe, "HOLY WHALE-SHIT!" The man should then go on to howl like a ravaged indian, making strange calls with his mouth.

when you're hungover as shit after a spending a night drunk as a skunk