Who, What, Why: Did Donald Trump use the word ‘bigly’?

There was a moment in the first US presidential debate when lots of people asked themselves: "Did Trump just say 'bigly'?"

Followed quickly by: "Is that even a word?"

It came during a discussion on fiscal policy, when, Donald Trump told his opponent: "I'm going to cut taxes bigly, and you're going to raise taxes bigly." Or so many thought, anyway.