The phrase comes from Brazilian Portuguese internet slang, where fechar os zói playfully spells closing your eyes, and it circulates mainly as a short reaction audio rather than as a line from a film or television show. Its exact original recording is not widely documented, so its popularity rests on how easily the phrase travels between memes, edits and soundboards. Creators reuse it because the wording is short, rhythmic and instantly recognisable to Portuguese-speaking audiences, even outside its first context. That portability has kept it in rotation for reaction videos, comedy edits and everyday chat replies.