The phrase ta ficando doido is everyday Brazilian Portuguese slang, roughly are you going crazy, used to call out behaviour that seems irrational or over the top. As a short isolated voice clip it spread through Brazilian meme pages, group chats and short video edits, where its meaning is understood from context even without a known original recording. Editors keep reusing it because the question works as a standalone reaction, needs no setup, and fits almost any clip of someone acting strangely, bragging wildly or proposing a terrible idea.