In high spirits

The idiom “in high spirits” is used to describe someone who is feeling very happy, cheerful, and enthusiastic. When a person is in high spirits, they are typically in a positive and upbeat mood, often displaying a lot of energy and excitement. The phrase "high spirits" refers to a state of elevated or elevated emotions, where one’s mood is lifted, and they feel particularly joyful or optimistic. It can be used to describe someone who is feeling elated, delighted, or simply in a good mood.
For instance, if you just got some great news about a promotion at work, you might be in high spirits, feeling ecstatic and full of positivity. Similarly, if you’re at a party with your friends and having a fantastic time, you could say that you are in high spirits, enjoying the moment to the fullest.