The person you bang because he or she, unlike you, has wheels.
"Can't make it over just now, but my Significant Uber gets off at 3, he can bring me before 4."
Not necessarily a Jewish person, although they seem to be the best examples. When a business person is giving you a PR facade and your comments strike a nerve having to do with his money or personal life. He (or she) then switches to a cold administrator quoting chapter and verse of regulations.
Trump was getting real chummy talking golf, till I mentioned his tax returns, boy, did I get the Cold Jew then! I swear I heard a voice behind me chanting: 'Thou art only a Goy'