The phrase is everyday French slang built around gueule, a crude word for mouth, and it is used online mainly as a short insult reaction rather than as dialogue from a known scene. Clips like this circulate in French speaking meme and chat communities, where a two second voice line can be reused as a punchline for bad breath jokes, roasts and gross out moments. Its appeal is its directness, with the meaning clear even from the tone alone.