crackbrain

American  

[krak-breyn] / ˈkrækˌbreɪn /

noun

1. a foolish, senseless, or insane person.

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crackbrain British  

/ ˈkrækˌbreɪn /

noun

1. a person who is insane

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Etymology

Origin of crackbrain

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

Example Sentences

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

From Project Gutenberg

You're no weakling, no romantic, filibustering crackbrain!

From Project Gutenberg

The return of War-great General Erich Friedrich Wilhelm Ludendorff from the obscurity of a suspect crackbrain to official sanity just as sound as any other German's nowadays, and also to official greatness, was accomplished last week by Adolf Hitler.

From Time Magazine Archive

Whether it was some crackbrain scribbler who tried to prove Poe "mad," some accomplished scholar who endeavored to disparage him in order to magnify some other writer, or some silly woman who attempted to foist herself into notice by relating "imaginary facts" concerning the poet's hidden life, Mrs. Whitman was always ready to defend her dead friend.

From Project Gutenberg

The good Henry Fullerton had long walked in darkness; doubts had been presented to him; jibes and sneers had hailed upon him; all sorts of mean detractors had tried to label him as visionary, or crackbrain, or humbug, or even as money-grub: and now the clouds that obscured the wild path along which he had fared with such forlorn courage were all lifted away, and he saw the fulfilment of the visions which had tantalized him on doleful nights, when effort seemed vain and hope dead.

From Project Gutenberg