A palm smack that is generally delivered to the head, not the face, used to get an individual's attention or indicate that they should rethink an action or statement.
Q has been playing Call of Duty for the past 13 hours. His girlfriend has just asked him, for the second time, if he wants to make a porno. Finally she dope smacks him in the back of the head, repeating her question. He promptly drops the controller and goes in search of the video camera