Testy \Tes"ty\, a. [Compar. Testier; superl. Testiest.]

[OF. testu obstinate, headstrong, F. t[^e]tu, fr. OF. teste the head, F. t[^e]te. 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.

Source: Webster's Revised Unabridged Dictionary (1913)