Wisser
Wisser is a German noun that describes a person who thinks they know more than others, often used to refer to a know-it-all. The term is informal and can carry a pejorative or playful tone depending on context.
Etymology and usage: Wisser is formed from the verb wissen (to know) with the agent suffix -er,
Context and connotation: The word is typically found in spoken language, headlines, and light literature rather
Other uses: Wisser also exists as a surname in German-speaking regions and may appear as a character