A Chillionaire is a person who is able to chill at all times. Chillionaire is not a monetary term. A Chillionaire is able to enjoy their hobby, job and family without worrying about there financial situation.
That dude is a Chillionaire, he rides pow pow all day.
Is he a millionaire? No man, he's a Chillionaire.
Someone who has made a tonne of money while still young, probably in one of the dotcom booms or by selling off another business they founded, and now loafs around doing cool stuff
Gary Fisher, Elon Musk are chillionaires