unhappy, dejected, sad, miserable, down, downhearted, downcast, depressed, blue, melancholy, gloomy, glum, dispirited, discouraged, disheartened, despondent, disconsolate, with a long face, forlorn, crestfallen, woebegone, subdued, fed up, out of sorts, low, in low spirits, in the doldrums, heavy-hearted

informal down in the dumps

British informal brassed off, cheesed off, browned off, peed off

North American informal teed off, ticked off

vulgar slang pissed off