a. Formerly cracked-, crackt-brained. [f. prec. + -ED.] Having the brain cracked or crazy, crazy-pated, impaired in intellect.
1634. Canne, Necess. Separ. (1849), 209. He would … have called him idle head, cracked-brained, fool.
1646. G. Daniel, Poems, Wks. 1878, I. 15. Crack-brain’d Menippus.
1671. Glanvill, Disc. M. Stubbe, 28. A crackt-brain’d Noddy.
1739. Wesley, Wks. (1872), I. 212. They always took me to be a little crack-brained at Oxford.
1843. Prescott, Mexico, I. 214. One of those crack-brained wits,—half wit, half fool.
1862. Trench, Mirac., Introd. 82. A certain crack-brained enthusiasm for the allegorical interpretation of Scripture.
