A person or persons for whatever reason have slipped to the bottom of the species intelligence grid. Possibly caused by head trauma, gestational drug use, binge drinking or simply genetic abnormalities most likely incest... Can be affected at any age and almost always permanent. The world is full of rum dumbs and nobody is policing the gene pool unfortunately!!
Oh no! Leroy fell on his head when he was younger and now he rides the short bus with the rest of the rum dumbs.
by Intothe4restigo January 7, 2023
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Rum Dumb • Rum dummy • Rum diddly dum dum • Rumdum • Rum • rum job • rum rum • Rum Runner • rum ham • Rum Tum Tugger
Jim Hendry is a total rumdum.
by bhogg September 9, 2006
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Get the Rumdum mug.Adolescents who shrug their shoulders and neglect to remember any directions given to them, no matter how frequent
by Betsy Pomeroy January 16, 2020
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