0 down in the mouth [idiom]Example: What's wrong with him? He's so down in the mouth about everything. Longman Dictionary of Contemporary English down in the mouth informal unhappy : Tim’s looking very down in the mouth. Oxford Advanced Learner's Dictionary down in the ˈmouth unhappy and depressed Oxford Advanced Learner's Dictionary 9th edition © Oxford University Press, 2015 Cambridge Advanced Learner's Dictionary Cambridge Advanced Learner's Dictionary - 4th Edition be down in the mouth informal to be sad © Cambridge University Press 2013 American EnglishBritish Englishfeeling sad and unhappyB1 (Intermediate)Shortened URL: http://lngt.co/5731en