Shared online as a short Portuguese voice meme, the clip is built around the simple announcement that Marcus is coming, which Brazilian users repurpose far beyond anyone actually named Marcus. It circulates on soundboards and in edited videos as a reusable entrance cue, dropped in whenever a familiar person, pet, or character appears at exactly the wrong moment. Its popularity comes from that flexibility, as the teasing warning fits group chats, livestreams, and reaction edits without needing any extra context to understand the joke being made in the moment.