The phrase "billionaire genius" refers to someone who is extremely intelligent and has become a billionaire, which means they have a net worth of at least one billion dollars. Full definition
To be fair, though, Tony Stark is a grown - ass man, and he's incredibly pompous about being a «billionaire genius playboy philanthropist,» as he put it. (inverse.com)
Caleb (Domhnall Gleeson), a coder at a Google - like company called Bluebook, wins an employee lottery to spend a week with CEO Nathan Bateman (Oscar Isaac), an eccentric billionaire genius who lives in a remote, high - tech house on a mountain estate, the better to conduct his mind - blowing experiments without scrutiny. (moviemezzanine.com)
Little surprise that the crowds chose to glee about Ridney Jr. being a sarcastic billionaire genius, because at least his character seemed like he was having fun with the superhero thing, whereas Superman and Batman and Spider - Man and Fan - Freaking - Tastic Four were all bemoaning just how hard and lonely and time - consuming and nauseous it was, what with the superpowers and awesome adventures and hot sexy love interests. (mutantreviewers.wordpress.com)