The phrase "curl lip at" refers to the expression of disapproval or contempt often exhibited by curling the lip upwards. However, there are several antonyms to this phrase, which signify a positive or agreeable emotion. To smile or grin at something suggests satisfaction or pleasure, while laughing at it may indicate amusing or entertaining qualities. A related term is to smirk, a slight and often self-satisfied smile that suggests disdain or a lack of respect. Another antonym is to beam, which captures the sense of radiating enthusiasm or joy. All of these words contrast with the negative connotation of "curl lip at" and express positive emotions instead.