A woman of loose morals that resides or was raised in a neighborhood that is infested with rats, i.e. the hood or a hood-like area. This woman will often have a face that appears to have had a rat shit upon it. Indicative of the Ratshit Hooker is a child from a previous relationship that is often neglected in lieu of bar hopping and subsequent fornication.
Man, that girl you took home last night was a real ratshit hooker!