In Brazilian online slang, seu lixo is a blunt way to call someone trash, and pairing it with Shoto gives the insult an anime fandom twist. Shoto Todoroki from My Hero Academia is widely recognised, so the name instantly signals the target to fans. The clip circulated as a WhatsApp audio, where short shouted reactions are forwarded between group chats and later reused on soundboards. Its popularity comes from that mix of Portuguese trash talk, fandom recognition and a delivery that works even without visual context.