The Ghost is done when you are doing a girl doggy style in a dark room in front of a window and you switch places with a friend who was hiding in the closet, very quickly and quietly so she does not know. He then procedes to do her from behind while you walk outside and stand in front of the window and wave at the girl.
Me and Bob pulled the Ghost on this girl yesterday, she almost had a heart attack!
A remeark that must made when someone gets beer spit on them while a a body of water, i.e. a pool, floationg down a river and such. The reciver of the beer shower cannot get angry either, they must enjoy the refreshing experience.
Bob: (spits beer on Joe's face)
Joe: Ahhh, refreshing!