What does bon qui mean in french?

"Bon qui" is not a correct phrase in French. It's possible there was a typo or you are misremembering the phrase.

Do you mean:

* "Bon qui" - This is not a phrase in French.

* "Bon quoi" - This translates to "Well, what?" or "So what?" It's an informal expression used to express surprise, annoyance, or indifference.

* "Bon, qui" - This means "Alright, who?" It's a phrase you might use when asking who someone is.

Please clarify your question and I'll be happy to help!