I'm sorry this definition is so dumb.

You're all stupid people and I hate you.

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".

Im so dumb i had to look up dumb on urban dictionary to find out what it means.
Retards

Me: How long would it take to get from Co-op City to Fordham Road on the 12?
Young Minority NYers: Dumb long, yo.

"it's 101 degrees outside!"
"ik it's dumb hot rn

Its not hard, its not long, its just D.U.M.B.