The phrase "beat breast" is often associated with the expression of grief or regret. However, there are several antonyms for this phrase that convey a more positive sentiment. Instead of beating one's breast, one can "rejoice," "celebrate," or "cheer." These words suggest a sense of happiness, relief, or pride. Other antonyms include "forgive," "accept," and "move on," which imply letting go of negative emotions and looking towards the future. By using these antonyms, we can shift the focus from dwelling on past mistakes or regrets to embracing the present and future with a more positive outlook.