Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
gyp (n., v.)
is best limited to Conversational and Informal contexts in its noun senses of “someone who cheats” and “an instance of cheating” and in its verb sense of “to cheat.” If, as some dictionaries suggest, the word is a clipped form of gypsy, it could well be considered an ethnic slur, but in fact it seems usually not to be so taken.
