Fake natty is gym slang for someone who claims a natural physique while secretly using performance-enhancing drugs, and the phrase has become a running joke in Brazilian fitness circles online. Deus me perdoe, meaning God forgive me, adds a mock-confessional twist, as if the speaker is admitting the obvious secret. Shared as a short reaction clip on social video platforms, it spread among gym meme pages and creators who use it to puncture exaggerated natural claims. Its appeal endures because the debate over natural versus enhanced physiques never really ends in fitness culture.