The phrase is everyday French slang, with jsp short for je sais pas, and the full line translates as I don't know, I don't live here. It circulates as a short, voice-altered reaction clip on soundboards and in short-form videos, where creators use it to deny involvement in a joke, a rumour, or a situation they did not cause. Its appeal comes from that double denial, which is broader than a simple no and easy to reuse across languages with subtitles. Because it is short and instantly understood, it keeps appearing in memes about avoiding drama.