social butterfly 社交迷（成语）

英文释义
(IDIOM) A person who enjoys and attends parties excessively.

例句
My energetic aunt is a social butterfly who enjoys going to several parties a week and has dozens of close friends with whom she spends time.

我姑姑精力充沛，是个社交迷，喜欢一周参加数次聚会，拥有好几十位和她一起打发时间的亲密朋友。