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A Jack the Jew is a fake rich Jew who talks too much about money and thinks he's the best at it. He’s not religious like the real Jews, he just wants your wallet.
My uncle is a Jack the Jew, he talks about stocks like it's a religion.
That guy at the bar said he’s a Jack the Jew, but he can’t even balance his checkbook.
My teacher called my dad a Jack the Jew because he buys too many expensive watches.