The phrase comes from everyday Brazilian Portuguese, where que que ta acontecendo is an informal way of asking what is happening. Short reaction clips like this spread through soundboards, messaging apps and short video edits because they are easy to reuse and instantly understood by Portuguese-speaking audiences. Its appeal is timing rather than context, so creators borrow it for unrelated scenes whenever a character, pet or player looks lost. That portability has kept it circulating as a quick confused reaction, even without a single famous source scene attached to it online.