down in (or at) the mouth
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Synonyms:
depressed Collocations, discouraged, unhappy Collocations, sad Collocations, woeful, glum, gloomy Collocations, saddened, miserable Collocations, mournful, grieving, down in the dumps , blue Collocations , feeling low, down Collocations , downcast, dispirited, despairing