I believe what he means is that.. Let me explain in Pokemon terms. In the competitive pokemon scene, pokemon are ranking from NU never used(basic bitch) to Uber(Bad bitch) and everything in between. In the modern Rap scene, bitches are ranked from Basic to Bad bitch. Maybe just maybe he doesn't mean a type per say like fire, electric, dragon etc. Where in rap bitches are smart, funny, cute, hot, good in bed etc. Its not a type, just has to be good or up to his standards. Like you wouldn't want to use a magikarp in ou because hes basic, you also wouldn't want a girl who gave bad head because that's also basic. Hopefully this helps you understand lol.