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
1 more definition
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