A girl who is exclusively after a free meal or an expensive gift. She actively seeks out dates with well-off men who will wine and dine her at upscale restaurants. She is usually physically attractive enough to make the man fall for her feminine wiles. She will rarely have sex with these men, until they spend a certain number of dollars on her. Nobody knows exactly what that number is, so the man keeps spending and spending, while the dinner whore keeps living it up.
As a mere graduate student living on a stipend, it is impossible to find a date in New York, as it is saturated with dinner whores.