1. "More dumb than"
2. Having a lower intelligence than a certain person/thing.
"Hey, 2+2=5!"

"You're dumber than a rock.."
by firegod678 February 22, 2005
a person who makes unbelievably stupid remarks.
Brandon is such a dumbers.
by KimEuphoria January 27, 2010
Dumber (dum-er) adj. Way below normal intelligence.
by Anonymous February 23, 2003

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