The phrase "in bad mood" refers to someone who is feeling unhappy, irritable, or angry. There are many antonyms for this mood. If someone is feeling happy, cheerful, or content, they would be in a good mood. For those feeling calm, relaxed, or at peace, they would be in a serene mood. If someone is feeling optimistic, hopeful, or encouraged, they would be in a positive mood. Those who are feeling energetic, lively, or enthusiastic are in a high-spirited mood. Finally, those feeling patient, understanding, or forgiving are in a forgiving mood. Everyone experiences different moods, but it's important to recognize and work on shifting negative moods to positive ones.