weisenheimer
/ˈwaɪzənˌhaɪmər/
noun
- A person who tries to show they are smarter than others, often in an annoying way; a know-it-all.
- The new intern acted like a weisenheimer, correcting everyone's grammar in meetings.
- Nobody likes a weisenheimer who always has to prove they're right.
- My little brother is such a weisenheimer — he thinks he knows everything about dinosaurs.
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