1 definition by spurboy

Top Definition
noun.
sex act, having sex with a girl on her period, missionary position, so blood drains onto her asshole. then anal so that the outside of her asshole is all red and brown like rust.
guy 1: "isn't your girl on her period?"
guy 2: "yeah, I just gave her a rusty spur!"
by spurboy October 08, 2008

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