A Genius
A genius is someone who’s got a brain that’s so big it might explode, and they’re either a total mess or a total legend, depending on whether they bother to act normal.
My brother is a genius. He invented a way to cheat at math, but he still failed algebra.
My neighbor is a genius. He figured out how to reverse-engineer the internet with a toaster and a pencil.
My dog is a genius. He figured out how to open the fridge and eat my entire lunch.