Top Definition
when a person sitting on a toilet taking a shit gives oral sex to someone standing in front of them
yeah i got a grumpkin then gave her a reverse grumpkin
by Bradford, PA March 03, 2011
5 Words related to reverse grumpkin
Same as a a grumpkin...A girl is taking the shit while the guy eats the girl out!
man! that was a good reverse grumpkin!
by Joe Davis September 11, 2003

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