v. [f. ASS + -(I)FY.] To make an ass of, turn into an ass. (Jocular.)

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1804.  Southey, in Robberds, Mem. W. Taylor, I. 515. Instead of oxifying or assifying myself.

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c. 1800.  ‘P. Pindar Jun.’ (title), An Assified Mare: the London Mare turned Ass.

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