The space between a man's thigh and his scrotum. This area usually becomes sweaty and extremely unpleasant to one's sense of smell. The only solution for a dirty, nasty lobe is powder, to dry to sweat up. The result, a "cathead buscuit."
A person that seems to be very attractive from a great distance, but when viewed at a close up or normal distance, the person is extremely ugly. Common occurences of one being is a scud could be caused by a messed up grill (teeth); the appearance of facial hair, a new view from the side and/or back, or simply a mullet.
Check out that beautiful girl...Oh Wait! It's a scud! Run!