CANTANKEROUS

adj. ill-natured, quarrelsome, perverse, cross, choleric, cross-grained, crabby, curmudgeonly, crusty, grumpy, surly, irascible, snappish, bad-tempered, ill-tempered, bearish, bilious, peevish, testy, irritable, touchy, disagreeable, tetchy, contrary, Colloq crotchety, grouchy, US cranky Simon used to be so friendly, but he's become a cantankerous old codger