irritable; touchy; peevish
Origin of testyMiddle English testif from Anglo-French from Old French teste, the head from Classical Latin testa: see test
Irritated, impatient, or exasperated; peevish: a testy cab driver; a testy refusal to help.
Origin of testyAlteration of Middle English testif headstrong alteration ( influenced by Middle English -if ) ( variant of -ive -ive ) ( as in natif native ) of Old French testu from Old French teste head from Late Latin testa skull ; see teston .
(comparative testier, superlative testiest)