wisenheimer

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Definitions from WordNet

Noun wisenheimer has 1 sense

wise guy, smart aleck, wiseacre, wisenheimer, weisenheimer - an upstart who makes conceited, sardonic, insolent comments
--₁ is a kind of upstart

Definitions from the Web

Term: wisenheimer

Description:

Wisenheimer is a noun used to describe a person who behaves in an overly confident or know-it-all manner, often making sarcastic comments or showing off their intelligence.

Sample sentences:

Don't pay attention to his remarks; he's just a wisenheimer.

Jane was irritated by Mark's wisenheimer attitude during the meeting.

The wisenheimer in class always had an answer to every question, but rarely contributed anything valuable.