Pundit – An expert or authority in a particular subject
The punk did it (pundit), she answered all the questions in the quiz, she was an expert and authority in many subjects.
Examples of pundit in a sentence
She was a pundit of wine, so they usually let her decide which wine would go best with their meal.
He often claimed to be a pundit of French culture, despite having never visited the country.
They'd assembled the perfect quiz team, they had a pundit for almost every subject.