The phrase is Brazilian Portuguese slang, roughly meaning who is in charge here, and it is often used online as a bold, profane reaction rather than a literal question. Short voice clips like this travel easily through meme pages, WhatsApp groups and short-form video edits, where the aggressive delivery matters more than the exact context. Because it is instantly recognisable to Portuguese-speaking audiences and needs no translation to feel confrontational, it has stayed useful as a punchy reaction sound for arguments, comebacks and moments of dominance.