wiseacre

🇬🇧/ˈwaɪzeɪkə(r)/ 🇺🇸/ˈwaɪzeɪkər/ 27
a person who wishes to seem wise 自作聪明的人

noun [专属名词]自以为聪明者

Jack is a wiseacre who hears the grass grow.
杰克是个自作聪明的人,对什么事都非常敏感.

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