The phrase itself is common everyday French slang, stronger than saying you are not interested and closer to swearing that you do not care. Clips of short spoken reactions like this spread through soundboards, group chats and short video edits because they are easy to reuse out of context. This one stays popular for its brevity, since a single second is enough to answer almost any situation. Its exact recording source is not documented, so its life online is defined by remixes, reposts and reaction use rather than a known scene or performer.
About this sound
A short French voice clip saying j'en ai rien à foutre, meaning I don't care at all, used as a blunt, dismissive reaction sound in memes and edits.
This is a very short spoken clip in French, just over a second long, delivering the phrase j'en ai rien à foutre in a flat, fed up tone. The line translates roughly to I could not care less, and the delivery sounds completely unbothered rather than angry. There is no music or extra effect behind the voice, so the attitude carries the whole joke. Dropped after bad news, an annoying request or a pointless argument, it instantly shuts the moment down and makes indifference feel funny, final and a little rude in the best meme way.