Is it spoken language
Sometimes, this spoken phrase is joined as one word "isit" or "izit.
Said to show interest in or surprise at what someone is saying.
A: John is gay. B: Is it? How do you know that?
A: John got his girlfriend pregnant, and they're getting married. B: Oh, is it! I don't even know he has a girlfriend.
A: Do you know that the youngest person who got pregnant in the world was just 5 years old! B: Is it?! Where do you read that?
This spoken phrase comes from South Africa.
Someone who is totally bad at doing something.
Mary really can't sing for toffee.