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. [ 1913 Webster ]
Must I observe you? must I stand and crouch Under your testy humor? Shak. [ 1913 Webster ]
I was displeased with myself; I was testy. Latimer. [ 1913 Webster ]