The phrase "curled lip at" implies a negative or dismissive response to something. Some possible antonyms for this phrase could include "smiled warmly at," "embraced wholeheartedly," or "greeted with enthusiasm." These antonyms suggest a positive and welcoming attitude towards the subject in question, rather than a negative or judgmental one. By using more positive language and attitudes, we can create a more inclusive and welcoming environment in our interpersonal interactions. It's important to be mindful of our language and actions, and strive to treat others with kindness and respect.