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1. Your Dad's wife and a person so vile as to be without any redeeming feature that you couldn't possibly call her a "mom".

2. A step mother who has ulterior motives; see gold digger.
Person A: "So I hear that your Step Mom took over your father's Will when he died."
Person B: "Step Cunt... Don't ever call her a Mom."
by Sinful Divinity February 28, 2016
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