← BackshareGuessmopey/ˈmoʊpi/adjectiveFeeling sad, gloomy, or lacking energy; in a low mood.After losing the game, she was mopey for the rest of the day.Don't be so mopey—let's go outside and do something fun.He gets mopey whenever it rains for too long.SynonymsglumdowncastsulkyAntonymscheerful