Originates from "The Shit" meaning the best, and "It Girl" meaning the hottest female in a certain community (e.g. high school, or a fraternity). Put the two together and you have the ultimate chick, a Shit Girl.
1) A positive phrase used to describe female behavior that exudes confidence and a carefree attitude, indicating self awareness of how attractive she is. Popularized by rapper Megan Thee Stallion.
2) Also used to describe the negative side of the carefree "hot girls" attitude, often behaviors that would be considered socially unacceptable for most people that hot girls get away with because people are drawn to them regardless.
1) Bitch fuck an opening shift, we on some hot girl shit tonight, ladies!
2) She really taking bathroom mirror selfies when we can see all the open makeup pallets in her fuckin sink? That's some hot girl shit right there.
A woman who is exhibiting hot girl behavior. This includes, but is not limited to: 1) being in her bag and his too 2) having unadulterated fun
3) loving her authentic self 4) isn’t nice to these niggas