from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Crazy or foolish.
  • adjective Extremely enthusiastic.
  • interjection Used to express contempt, disappointment, or refusal.

from the GNU version of the Collaborative International Dictionary of English.

  • interjection slang An expression of disapproval, defiance, or displeasure, as in: “Ah, nuts! My knife just broke.”
  • slang Crazy; loony; insane; batty; -- used in a predicate position, ususually in phrases such as to go nuts, went nuts, are you nuts?

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Plural form of nut.
  • noun vulgar, slang Testicles.
  • noun poker A hand that can be proven unbeatable even when the hand's holder does not know any of the hidden cards the other poker players involved in a hand hold or held.
  • adjective colloquial Insane, mad.
  • adjective colloquial, figuratively Crazy, mad; unusually pleased or, alternatively, angered.
  • interjection Indicates annoyance, anger, or disappointment.
  • interjection Signifies rejection of a proposal or idea, as in forget it, no way, or nothing doing.
  • verb Third-person singular simple present indicative form of nut.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective informal or slang terms for mentally irregular


from The American Heritage® Dictionary of the English Language, 4th Edition

[From nut.]


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  • It was nuts for the crowd, though maybe not for the king's friends HF 29

    December 7, 2006

  • Stun in reverse.

    July 22, 2007

  • Interesting short article on how/when nuts came to mean crazy.

    October 12, 2007

  • "Kick me in the nuts." - The Dudesons.

    March 1, 2009