Kung-Jew is the ancient Hebrew art of negotiation, thrift and litigation. Since the recession, the art of Kung-Jew has enjoyed a resurgence of popularity even outside the Jewish community.
Con Edison tried to over bill us outrageously for utilities last month, but my roommate Herschel busted out his Kung-Jew skills and quickly had them send us an amended bill which reflected the correct meter reading. One day he has to teach me how he does that!
My landlord tried to hold onto my deposit unfairly, though I vacated the apartmentl on time and left it in good condition, but he backed down when I told him that I had studied Kung-Jew.