Can be used derogatorily as a verb meaning to haggle. You can "Jew down" the price of an item. Jew can also be used as a noun to refer to someone who is a miser or tight with money. I suppose that these racist usages come from the Middle Ages when Jews were often merchants and moneylenders. The latter is important because during that time period usury was considered a sin to Christians. Hopefully over the next hundred years Jew as a verb will start to mean "to be funny" and Jew as a noun will mean "entertainer". Oh, wait, that's horribly racist too.