Usually written on a shirt worn by huge black girls who want to feel better about themselves. These shirts are usually sold in mall kiosks by people who are too fucking lazy to get a real job.
"Your fat stomach is popping out from under your baby girl shirt."
Baby girl is a word invented by Bang Chan , the leader of Stray Kids. It is the other name for Stays . He apparently used the word during VLive broadcasting. Recently used on 28 of November 2018