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One level worse than a back stabber.

One who twists the knife after stabbing you in the back.
by Danny3999 October 02, 2016
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One who kicks another while they are down. A person who latches onto another's insecurities and makes them feel worse.
Did you hear what Brittany said to that homeless guy about his life sucking - that was a real knife twister.

Man, Brittany is a real knife twister.
by Giles Rich April 12, 2011
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