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

  • adj. Chiefly British Slang Insane; mad.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Plural form of cracker.
  • adj. Crazy; mad.

from the GNU version of the Collaborative International Dictionary of English

  • adj. crazy.

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

  • adj. informal or slang terms for mentally irregular


Probably from cracker, breakdown.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From firecrackers in the head. Originally "He's got the crackers" then "He's gone crackers". Started as UK naval usage in the 1920's. (Wiktionary)



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  • This is a very
    democratic lounge:
    Schultz lectures logic,
    Fats is a binman.
    Fats gulps mild. Schultz pays.

    Schultz sips dry Vermouth.
    They are both crackers...

    - Peter Reading, 5x5x5x5x5, 1983

    July 1, 2008