Trabalha no meu k7 comes from the Brazilian Portuguese dub of Family Guy, where the phrase about working on a k7, the local name for a cassette tape, became a standalone joke outside its original scene. Shared on soundboards and in short video edits, it spread among Portuguese-speaking viewers who recognised the dub voice and the retro reference. It remains in use because the line is short, quotable and easy to drop over unrelated footage, turning a simple statement about an old format into a running gag about being stuck in the past.