A whore or slut that tries to reshape the word into it being positive. Basically a promiscuous girl normally obese/overweight "thick" and usually black & easy.
A baddie” is typically a female person who is highly self-confident and assured of herself. More simply, it can be understood as the equivalent of the male term “alpha.
She walks into every room with confidence and presence — a true baddie in every sense of the word.