a. [f. JAPE sb. + -ISH1.] Of the nature of a jape; inclined to jest. Hence Japishly adv., Japishness.

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1882.  Sat. Rev., 4 Nov., 598/2. Surely a man of some japishness … might be fished out here and there. Ibid. (1888), 15 Dec., 714/2. Stockton’s Bee-man of Orn is a collection of Märchen, writ japishly, and of varying value.

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