A sexual act where one shoves his penis in another's ass and pulls it back out. If there is poo on it, he must go back in for 6 weeks.
Guy: "Have you seen Bill lately?"
Girl: "Yeah. My mom caught him reverse groundhogging my sister. Now he's stuck there for 6 weeks."
Girl: "Yeah. My mom caught him reverse groundhogging my sister. Now he's stuck there for 6 weeks."
by Hilbeah Albion December 2, 2010
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