Tĕs'ty, a.

a. [compar. TESTIER; superl. TESTIEST.] [O. Fr. testu, N. Fr. têtu, from teste, tête, the head; Pr. testart, It. testardo, Sp. *testarrudo. See TESTER.] Fretful; peevish; petulant; easily irritated.

Must I stand and crouch under your testy humor? Shak.

I was displeased with myself; I was testy. Latimer.