She’s trying to say she did something better than “these hoes.” Of course she’s using it wrong, because you don’t “stunt” every day, but rather on specific occasions. For example, if I just bought a Mercedes-Benz G-Wagon (which I did not), I might be inclined to post a braggadocios picture on Instagram with the caption “stuntin on these hoes.” In that instance, I am doing better than many (if not all) of the hoes that follow me.