Wisenheimer (noun)
wiz-en-hi-mer
A person who behaves in an irritatingly smug or arrogant fashion, typically by making clever remarks and displaying their knowledge.
I love this word! Coined in the US in around 1920, and used informally in US language.
Example sentences
“He’s always strutting around making declarations, the wisenheimer.”
“He’s such a wisenheimer, he immediately makes people defensive.”
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