Tes″ty (?), a. [Compar.Testier (?); superl.Testiest.] [OF. testu obstinate, headstrong, F. têtu, fr. OF. teste the head, F. tête. See Test a cupel.] Fretful; peevish; petulant; easily irritated.
Must I observe you? must I stand and crouch
Under your testy humor? Shak.
I was displeased with myself; I was testy. Latimer.