Aviva Drescher vs. Ramona Singer and Sonja Morgan
Last season on The Real Housewives of New York City, Ramona Singer and best buddy Sonja Morgan weren't thrilled when Aviva brought her hubby along on a girls vacation, for obvious reasons. Aviva's reaction was anything but apologetic. She flipped out and called them "disgusting" and "white trash." Funny thing was, the women had to google the white trash reference to understand the insult.

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The Real Housewives of New York City
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