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1.
A woman who engages in anal sex. It may refer simply to a woman who 'takes it in the ass', or it may refer to a woman who prefers it 'in the ass'. The distinction is contextual. Not to be confused with a backdoor man, who sleeps with married women.
I never have to worry about the rag with her; she's a backdoor woman.
by Der Golem January 26, 2010