Generally speaking, a short version of "don't know." Can be used for all emotions conected with I don't know, but most commonly for doubt or confusion.
by Kelsuu December 04, 2005
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It means that someone does not know of something or someone.
"Do you know where you put the remote George?"

"No Thelma, I dunno"
by Louiegi September 13, 2006
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A term used when a person has been asked a question and doesn't know the answer. Equal to "I don't know", or alternatively "I don't have anything to say, so shut the hell up".

Often overused by people whose minds do not have the mental capacity, or cannot be expected, to think of something for themselves.

NOTE: Never say "dunno" when you have been kidnapped by a bunch of bearded and smoking thugs. You can promptly expect a hard kick in the balls.
Crowd: Matt stole the cookie from the cookie jar!
Matt: Who me?
Crowd: Yes you!
Matt: Couldn't be!
Crowd: Then who?
Matt: I dunno.
by Cookie Expert August 29, 2010
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the answer to every question any one could ever ask a person
how are you- i dunno
whats ur fav colour-i dunno
by kee-yah November 08, 2006
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Short for 'Don't know' also an acronym for 'Do U Need No Opinion'.
A common reply when the asked person feels that there will only be disagreement or required effort if they give an answer.
Do you think this is the best way to get there ?
Dunno.
by Garratt June 23, 2007
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