The phrase "coming on like" signifies a certain level of intensity or enthusiasm. Antonyms for this phrase include "holding back," which implies that someone is exercising restraint or not expressing themselves fully. Another antonym for "coming on like" is "calming down," which indicates a decrease in energy or enthusiasm. Additionally, "fading away" implies a gradual decrease in intensity or enthusiasm. "Taking it easy" is another antonym as it suggests a relaxed and unhurried approach. Lastly, "holding out" is an antonym that implies cautiousness and the refusal to act impulsively. By knowing these antonyms, speakers can convey a variety of emotions and attitudes.