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1.
1)Inabilty to speak, Mute
2)Lacking intelligence, stupid
That deaf "dumb" and blind kid sure plays a mean pinball --The Who

I cant believe you would test to see if that wire is live with your tounge. Man your "Dumb".
by Jdlaxer April 30, 2007
 
2.
Someone who isn't smart.
see Stupid and dimwit
Im so dumb i had to look up dumb on urban dictionary to find out what it means.
Retards
by Edz April 05, 2004
 
3.
adv. extremely.
synonyms: mad, hella
Me: How long would it take to get from Co-op City to Fordham Road on the 12?
Young Minority NYers: Dumb long, yo.
by jennifer October 20, 2004
 
4.
Dumb(dum) adj. Below normal intelligence.
by Anonymous February 23, 2003
 
5.
George W. Bush. He is soooooooooooooooooooooooo dumb!!!!!!!!!!!!!!!!!!!!
George Bush, you are dumb!!!
by wathds October 28, 2006
 
6.
extreemly. A New York form of slang.
"It's dumb cold out there. You better put on a coat." "Damn that's dumb expensive."
by sweetychikc January 15, 2006
 
7.
adjective, usually follows go, ignorant and unprohibited; crazy, hyphee.
Im bout go dumb in this bitch, real talk, they better play that song.
by A.O. March 17, 2005