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

  • adj. Slang Crazy: "That's the horrible thing when you're bananas—nobody can know the awful things that are going on in your head” ( Otto Friedrich). "City dwellers . . . are subjected to so much noise it drives them bananas” ( New Yorker).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Plural form of banana.
  • adj. crazy, mad, nuts


From banana, worthless or crazy person, from banana.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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