One of Satan's many colorful nicknames. This particular one originates from the Danish "skratte," meaning some kind of monster or wizard. From there, it became "scrat" in middle English, which meant hemaphrodite or goblin. Then it ultimately became "owd scrat," and then "old scratch."

The name of the animal in the introductions done by Trey Parker and Matt Stone for the first two batches of South Park video tapes. Old Scratch is a dog that mysteriously changes from one breed to another in the "Fireside Chat" intros on the first three tapes, and a horse in the "Cowboy Show" intros on the next three.