Definitions

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

  • n. Slang A person regarded as silly or stupid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Someone who is not very smart or clever.

from the GNU version of the Collaborative International Dictionary of English

  • n. a person with confused ideas; incapable of serious thought.

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

  • n. a person with confused ideas; incapable of serious thought

Etymologies

From the compound bird +‎ brain, implying that the brains of birds are small. (Wiktionary)

Examples

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Comments

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  • Exactly.

    December 19, 2008

  • It most obviously does not apply to birds if one looks at the second WeirdNet definition...

    December 19, 2008

  • Actually, they're quite intelligent. I suspect that the person who coined this term believes that size matters, unfortunately.

    December 19, 2008

  • Are birds particularly stupid or confused?

    December 19, 2008