Definitions

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

  • n. An eccentric person, especially one with bizarre ideas.
  • adj. Foolish; harebrained: a crackpot notion.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An eccentric, crazy or foolish person. A kook.
  • n. Someone addicted to crack cocaine (i.e. a drug addict). See also crackhead.
  • adj. Eccentric or impractical

from the GNU version of the Collaborative International Dictionary of English

  • n. a whimsically eccentric person.

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

  • n. a whimsically eccentric person

Etymologies

crack(ed) + pot1, skull (obsolete).
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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  • Drugs make you crazy.

    November 26, 2008