"Yes, and that's it, my dear, you can say it."
Here's a breakdown:
* Oui: French for "yes"
* et voilà: A common French phrase that means "and there you have it" or "and that's it".
* ma chérie: A French term of endearment, meaning "my darling" or "my dear".
* tu peux le dire: "You can say it."
The overall meaning is that the speaker is agreeing with something and encouraging the person they're talking to to say it out loud. It's likely used in a playful or affectionate way.
It's important to note that this phrase is a bit informal and wouldn't be used in formal situations.