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a derogatory name given to someone who is an avid liar; it also implies that they have done something improper, usually sexually. Properly said with a slightly British accent. May also be used as an exclamation.
Girl 1: "I have something to tell you."
Girl 2: "What is that?"
Girl 1: "I slept with your brother."
by Just Your Mother January 08, 2011
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