subs. (common).—A generic reproach: spec. a rough, brutal, uncouth character. In America = a back-country lout, a greenhorn (BARTLETT). [A name given by Swift in his Gulliver’s Travels (1726) to a race of brutes, described as having human forms and vicious and degraded propensities. They were subject to the Houyhnhnms, or horses endowed with human reason.] As adj. = boorish, loutish, uncouth.

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  1772.  R. GRAVES, The Spiritual Quixote, IV. x. To see a noble creature start and tremble at the passionate exclamation of a mere YAHOO of a stable-boy … equally excites my pity and my indignation.

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  d. 1790.  T. WARTON, Newmarket, 170. That hated animal, a YAHOO squire.

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  1861.  H. KINGSLEY, Ravenshoe, lv. ‘And what sort of fellow is he?’ said Lord Saltire. ‘A YAHOO, I suppose?’ ‘Not at all. He is a capital fellow—a perfect gentleman.’

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  1900.  R. H. SAVAGE, Brought to Bay, v. You frontier YAHOOS know nothing but herding cattle.

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