I knew that Manute Bol, who died recently, was the tallest player in the NBA at 7' 7". I knew that during his playing career, he was an extraordinary shot-blocker. I knew that, after his playing career ended, he was an extraordinary humanitarian. But I didn’t know, until a minute ago, that he invented the phrase “my bad” to describe one’s own mistake. (Hat tip to Johnson.)
p.s. Then again, according to the Language Log, Bol may have just been an early user of the phrase. Still, I’d like to think that he invented it.