Is the phrase ferme la bouche french?

Yes, "ferme la bouche" is French. It means "shut your mouth".

Here's a breakdown:

* Ferme: Means "close" or "shut"

* La: The definite article, meaning "the"

* Bouche: Means "mouth"

So, the literal translation is "close the mouth".

It's important to note that this phrase can be considered rude or aggressive, similar to "shut up" in English.