Oh, He's Such A Good Egg."

You have probably heard the expression, “A good egg is a friendly, old-fashioned way of talking about a really nice guy or an exceptionally kind person. And when you call your next-door neighbor a good egg, it’s clear that you’re fond of her. But, did you know that the expression originally came from its opposite, bad egg, British public school slang from the 1800s for someone who was not very nice?