What is a “she wolf” as referred to in Shakira’s new song?


Kate asked:


I’ve heard the phrase before but never really knew what it meant. I had thought that it was a euphemism for prostitute because of the ancient brothel in Pompeii called “Lupanar,” but the way it’s used in Shakira’s song makes me think that she wouldn’t be [basically] praising prostitution. So, what exactly does is mean to be called a “she wolf?”