gyp- to get ahead of someone without permission- never heard that one before. Perhaps a new meaning popping up.
Not in Lighter, 1994, Vol. 1, Historical Dictionary of American Slang.

Also used in the British military and civil service to refer to an Egyptian or Egyptian practices (1889).
Applied to horsemen (or small stables), who follow a racing circuit, and are not in the big money (1930s). Not derogatory.

There are so many discriminatory words that it would take a book to list them all.

Wolfgang's "turk"- In American usage, "a young, dynamic person eager for change"- Webster's (often applied to a young politician on the rise). Not necessarily derogatory.
The English have several definitions (OED) but I don't know which are current.