Ague.cheek.
Sir Andrew Aguecheek, a straight-haired country squire, stupid even to silliness, self-conceited, living to eat, and wholly unacquainted with the world of fashion. The character is in Shakespeare’s Twelfth Night.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.