The phrase itself is French slang, combining a vulgar insult with a mocking reference to a moustache, which is why it circulates mainly among French speaking users online. Short insult clips like this spread through soundboards, group chats and short form edits because the meaning is clear even in a few seconds and the delivery carries the joke. It belongs with other French insult clips used for comic roasts rather than serious arguments, and it remains popular as a quick reaction when a creator needs an exaggerated, theatrical put down.