The phrase "am down in mouth" refers to feeling sad or unhappy. However, there are many antonyms, or opposite words, that can be used to describe the opposite of this feeling. Some of these antonyms include happy, joyful, elated, content, satisfied, and cheerful. Other antonyms for "down in mouth" may include optimistic, positive, confident, excited, inspired, and motivated. When feeling "down in mouth," it is important to remember that these negative emotions are only temporary and can be overcome with positive thinking and a shift in perspective. By focusing on the antonyms of this phrase, we can cultivate a more positive, joyful outlook on life.