The line belongs to Kakashi Hatake, the masked Copy Ninja from Masashi Kishimoto's Naruto, whose anime run began in 2002. This particular take comes from the Brazilian fan-dub scene around Voicemakers, the voice channel behind countless Brazilian meme dubs, rather than the official localization. Short clips like it spread through WhatsApp audio groups and Brazilian soundboards, where the deadpan delivery made it a staple reaction, as handy as the classic anime wow reaction sound for flagging absurd moments without a word of explanation.