Someone who uses a scarf to wipe their butt clean. The scarf is grasped at one end behind the rear, pulled between the legs and held at the front by the other hand. A swift sawing motion back & forth cleans the rear. This could cause a UTI if not careful.
While trying to show her friends that she's a shit-scarfer, S*****y gave herself a wedgie.
When someone comes suddenly and you were not expecting and you felt terribly frightening. You were so frightened that you meant that the person made the shit comes out from you.