When a male delivers an upper cut punch into a womans uterus that results in a miscarriage.
Girlfriend: "I am pregnant with your baby."

Boyfriend: Looks both ways to make sure no one is watching then uterus punches her. "Not anymore, bitch."
by Uterus Punch Man July 3, 2008
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Very crude way of describing terrible sex. Also sometimes called rabbit sex, so hard that the girl feels it in her uterus.
That sex last night was awful, total uterus punching right there.
by Meghan Montgomery December 21, 2007
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