The line comes from Nadsongl's video titled O professor que reprova por 1 decimo, which centres on a strict teacher who fails a student over a single tenth of a grade point. The short phrase stood out because its tangled timeline sounds like a frustrated correction, and Brazilian meme pages and soundboard users began lifting it as a standalone reaction clip. It remains in circulation because the setup is instantly recognisable to anyone who has faced a pedantic teacher, and the two-second length makes it easy to drop into edits, chats and short videos.