The phrase is everyday Brazilian Portuguese slang, with 'ta comendo o que' meaning 'what are you eating' and the reply using a common swear word as the joke answer. Clips like this circulate mainly as short WhatsApp audios and reposted soundboard buttons, passed around without a credited original recording or performer. Its popularity comes from how instantly understandable the setup is, even out of context, making it a reusable insult reaction for food fails, disgusting moments and friends teasing each other about what they are eating.