anyone who "thumbs downs" a definition of dumb saying "speechless or mute"
Tod is so dumb, he didn't know that dumb meant mute.
by shane gamer January 14, 2007

This is where the black budgeted military contains such aliens as the "grays" and the "dracos".
"The government will never admit that D.U.M.B. houses those cattle-mutilating, human-abducting gray aliens".
by MeBobaFett September 30, 2005
(n) slang for nitrous oxide
let's all do some dumb!
by pandora April 19, 2005
you. (because you ACTUALLY had to look this up)
they laughed at him for an hour because he
told them that he had to look dumb up on
by Karen C. July 06, 2005
Jake Anderson, a stupid mexican kid.
Jake is so fucking dumb!
by William Shat January 05, 2008
adj. More then likely you are DUMB because you had to waste a few brainwaves and time to look up the word. The word is often written dum because the person is too ignorant to be able to spell an easy word or they don't realize that it has a silent b like comb.
You are dumb for looking up dumb on urbandictionary. com instead of doing it secretly in a library.
by sgkitty February 03, 2005

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