Often done by guys who like to have sex with girls and if they were going out with them then they break up with them, if not then they stop talkin to them... If done by a girl she is automatically called a HOE!
You see someone. You like what you see. You get to know them. Then, you hit it. After you hit it, you stand up and you say thank you that way they know you appreciate what they did, and then you WALK OUT. After that, you never have any sort of contact with them ever again.