Besserwisser
Besserwisser is a German noun used to describe a person who insists on knowing better in conversations, often correcting others and asserting expertise on many topics. The term carries a pejorative connotation and suggests arrogance or pedantry. A Besserwisser may interrupt discussions, dismiss others' opinions, or treat minor mistakes as opportunities to display superiority.
Etymology: the word combines besser (better) and wissen (to know), literally "better-knower." The feminine form is
Usage: common in everyday speech, media, and literature within German-speaking regions. It can be used humorously
In broader terms, the concept corresponds to the English "know-it-all" or "smart aleck." The Besserwisser archetype