The phrase is plain French for you are animals, which explains why it travels so well outside French speaking clips as a meme sound. Short scolding lines in another language often become reaction staples because the tone carries the joke before the translation does. This one circulates on soundboards and in short form edits as a quick insult for feral behaviour, group chaos and messy fails. Its one second length makes it easy to loop, layer over a zoom in, or repeat for emphasis without wearing out the punchline.