jew
v.
"to cheat, to drive a hard bargain," 1824, from Jew, n. (compare gyp, welsh, etc.). The campaign to eliminate it in early 20c. was so successful that people began to avoid the noun and adjective, too, and started using Hebrew instead.
Now I'll say 'a Jew' and just the word Jew sounds like a dirty word and people don't know whether to laugh or not. [Lenny Bruce (1925-1966)]