crackpot

[ krak-pot ]
/ ˈkrækˌpɒt /
Informal.

noun

a person who is eccentric, unrealistic, or fanatical.

adjective

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. 2020

Example sentences from the Web for crackpot

British Dictionary definitions for crackpot

crackpot
/ (ˈkrækˌpɒt) informal /

noun

an eccentric person; crank

adjective

(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