Adjectives

(s)cholericeasily moved to anger“men of the choleric type take to kicking and smashing” (H.G.Wells)
(s)choleric, irascible, hotheaded, hot-tempered, quick-tempered, short-temperedquickly aroused to anger“a hotheaded commander”
(s)choleric, irasciblecharacterized by anger“a choleric outburst”, “an irascible response”