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crackpot

[krak-pot]Informal.
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noun
  1. a person who is eccentric, unrealistic, or fanatical.
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adjective
  1. eccentric; impractical; fanatical: crackpot ideas.
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Origin of crackpot

First recorded in 1860–65; from the phrase cracked pot
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

kookscrewballoddballlunaticmaniacnutflakecrankwackoinsane

Examples from the Web for crackpot

Contemporary Examples

Historical Examples

  • So that crackpot, Graham, had finally come up with something definite.

    Final Weapon

    Everett B. Cole

  • They dismissed him as a crackpot, too, if they heard about him at all.

    With No Strings Attached

    Gordon Randall Garrett (AKA David Gordon)

  • Therefore, it wouldn't have happened—outside the crackpot fringe.

    The Great Gray Plague

    Raymond F. Jones

  • These had to be investigated—every lousy, crackpot one of them.

    The Great Gray Plague

    Raymond F. Jones

  • Projective telepathy had only been a crackpot's idea back then.

    The Penal Cluster

    Ivar Jorgensen (AKA Randall Garrett)


British Dictionary definitions for crackpot

crackpot

noun
  1. an eccentric person; crank
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adjective
  1. (usually prenominal) eccentric; crazy
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for crackpot

n.

"mentally unbalanced person," by 1900, probably from crack + pot (n.1) in a slang sense of "head." Cf. crack-brain "crazy fellow" (late 16c.). Earlier it was used in a slang sense "a small-time big-shot" (1883), and by medical doctors in reference to a "metallic chinking sometimes heard when percussion is made over a cavity which communicates with a bronchus."

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Online Etymology Dictionary, © 2010 Douglas Harper