noun. A word used to describe a girl who, much like a hamburger stand on free hamburger day, gives it out for free. Usually something you may want to avoid, as there is a greater risk of acquiring infectious disease.
Person 1: Man, I could really use a bite of something nice tonight.
Person 2: Why not call Jill? I heard it's free hamburger day every day over there.
Person 1: Yeah, I'd have to make a preemptive appointment at the clinic for that hamburger stand..