wisenheimer

/ˈwaɪz(ə)nˌhaɪmə/ 26
a person who behaves in an irritatingly smug or arrogant fashion, typically by making clever remarks and displaying their knowledge.

noun [专属名词]自作聪明的人

You might expect from a wisenheimer.你可能对自作聪明的人有所期待。

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