The phrase comes from everyday Brazilian Portuguese, where sonsa describes someone who acts innocent or clueless while likely knowing exactly what is happening. As a short voice clip it spread through chat apps and soundboards as a ready made comeback, shared between friends for teasing rather than serious arguments. Its appeal is the blunt either or framing, which turns a common suspicion into a quotable line. It remains popular in Portuguese speaking meme culture because the wording is instantly understood and fits many everyday situations.