See more synonyms for crackpot on
  1. eccentric; impractical; fanatical: crackpot ideas.

Origin of crackpot

First recorded in 1860–65; from the phrase cracked pot Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for crackpot

kook, screwball, oddball, lunatic, maniac, nut, flake, crank, wacko, insane

Examples from the Web for crackpot

Contemporary Examples of crackpot

Historical Examples of crackpot

  • 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


  1. an eccentric person; crank
  1. (usually prenominal) eccentric; crazy
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

"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."

Online Etymology Dictionary, © 2010 Douglas Harper