crackbrain

American

[krak-breyn] / ˈkrækˌbreɪn /

noun

a foolish, senseless, or insane person.

crackbrain British

/ ˈkrækˌbreɪn /

noun

a person who is insane

"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

Etymology

Origin of crackbrain

First recorded in 1560–70; crack(ed) + brain

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Hardly a hero, or crackbrain, or rantipole in Europe, one would think, but must have been then on exhibition somewhere in Naples.

From Modern Leaders: Being a Series of Biographical Sketches by McCarthy, Justin

Such a crackbrain as thou art, I never saw the like to it.

From A Select Collection of Old English Plays, Volume 2 by Hazlitt, William Carew

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023