Mephistopheles

[Tina]

A demon frequent in occult mythology, and a cheif member in the Faust legend. Often seen in the form of a dog, horse, or raven familar.

[Little_Girl]

A name for a demon of devil associated in the Faust legend.
By the 17th century, the name had begun to lead an existence independent of the Faust legend.
Now it is just another word smart people can call people they dont like. Since is it fairly unknown, its handy because people wont argue with you for fear of looking stupid by asking what it means.