Facticular
A person who knows more than you and likes to show off like they just got a gold star for being smart
My cousin is a facticular. He can tell you the exact number of toes a sloth has.
I asked my teacher a question, and she said, 'You’re not a facticular, you’re just a human Google.'
At lunch, my friend said, 'Did you know the Eiffel Tower is taller than the Statue of Liberty?' I said, 'You’re a facticular.'