A seemingly stupid person that is very wealthy because his/her investments always pay off for no apparent reason.
Steve: How did Rich become so wealthy? Was his daddy loaded?

Bill: No, he picks stocks with names that remind him of cartoon characters.

Steve: What? He’s as dumb as a rock

Bill: I know, but they always pay off. He’s a Bumblinaire.
by The Original Tankboy February 19, 2019
Get the Bumblinaire mug.