The clip is credited to Shone, a French rapper known for blunt street slang, and it circulates on French soundboards as a ready made reaction. The expression on s'en bat les couilles has been common in spoken French for decades, long before memes, used when someone wants to show complete indifference in the crudest possible way. Short excerpts like this spread because they need no context, work in group chats and video edits, and give French speakers an instantly recognisable punchline for moments that deserve no attention at all whatsoever.