• WordNet 3.6
    • adj brainsick affected with madness or insanity "a man who had gone mad"
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Webster's Revised Unabridged Dictionary
    • a Brainsick Disordered in the understanding; giddy; thoughtless.
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Century Dictionary and Cyclopedia
    • brainsick Disordered in the understanding; fantastic; crotchety; crazed.
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In literature:

He who least regards Such brainsick phantasies lives most at ease.
"The Oedipus Trilogy" by Sophocles
See to him, Vallancey; he is brainsick with the fumes of war.
"Mistress Wilding" by Rafael Sabatini
The brainsick words of sophists: Antisthenes.
"Ulysses" by James Joyce
You must excuse my unbelief, though Mrs Brainsick is better satisfied.
"The Works of John Dryden, Vol. 6 (of 18)" by John Dryden
O Brainsicke, Rashe, Spitefull, and Disdainfull Countrey men.
"The Mathematicall Praeface to Elements of Geometrie of Euclid of Megara" by John Dee
Thou art brainsick, surely.
"The Best of the World's Classics, Vol. V (of X) - Great Britain and Ireland III" by Various
Posterity can do simply nothing for a man; nor even seem to do much if the man be not brainsick.
"Past and Present" by Thomas Carlyle
Take Dryden for example; and compare Woodall with Brainsick, or Lorenzo with Gomez.
"Critical and Historical Essays, Volume III (of 3)" by Thomas Babington Macaulay
To be brainsick and heartsick in a cruel and unfamiliar world is to be morbid.
"The Book of Susan" by Lee Wilson Dodd

In news:

Shopping as brainsick cage fight.