The phrase comes from everyday Brazilian Portuguese slang, where qq is shorthand for que que and mano is a friendly way to address a friend, so the line reads as a very informal what is that, bro. Short reaction clips like this travel easily on social video and messaging apps, where creators reuse a single spoken moment instead of recording their own reaction. Its brevity makes it easy to drop into edits, and its local slang gives Brazilian and Portuguese-speaking audiences an immediate sense of shared humour.