Stands for "InshaAllah," and I've taken to including it in my regular text online nowadays, not just with my Muslim friends. "InshaAllah" translates more or less to "God willing," and it's considered not a good idea to not say it when you're hoping for something, lest you risk it not coming true. So if you ever see me saying it, that's why! Need all the good vibes I can get lately lmfao.