WordNet sense 1 (inclined to anger or bad feelings with overtones of menace):

surly

WordNet sense 2 (showing a brooding ill humor):

sullen

WordNet sense 3 (easily irritated or annoyed):

fractious, irritable, peevish, petulant

WordNet sense 4 (perversely irritable):

crabbed, cross, ill-tempered

WordNet sense 5 (having a bad disposition; surly):

churlish

WordNet sense 6 (having a difficult and contrary disposition):

ornery