Curling one's lip is often associated with showing contempt or disapproval. Some antonyms for this expression might include showing admiration, respect, or appreciation. Instead of curling your lip, you might smile warmly to show approval or nod approvingly to demonstrate agreement. These contrasting expressions can convey completely different emotions and are often used in different situations. For instance, if you admire someone's skills or talents, you might show appreciation by applauding, while if you dislike something someone has done or said, you might curl your lip to show disapproval or contempt. Ultimately, the use of opposite expressions can significantly impact the way information is conveyed and received.