WordNet sense 1 (easily irritated or annoyed):

cranky, fractious, irritable, peevish, pettish, petulant, scratchy, testy, peckish, techy, tetchy

WordNet sense 2 (having an irritable and unpleasant disposition):

ill-natured

WordNet sense 3 (causing irritation or annoyance):

annoying, bothersome, galling, irritating, pesky, pestiferous, vexatious, pestering, plaguey, plaguy, teasing, vexing

WordNet sense 4 (not to your liking):

disagreeable