the act of exiting a motor vehicle, specifically a car, while it is still in motion, and dancing either next to or on top of the vehicle.
Mike and Kev were grippa bored so they so they started ghost-riding the whip down 3rd ave, Mike thizzed on the windshield while Kev did the harlem shakeon the roof.
A car trick, done by setting the car in neutral then allowing for the car to roll ahead or down a hill, while the driver walks along side the car to give an impression of a ghost driving the car, without letting it get out of control of course.
Jack: you wont believe what i did last night man
jim: what was it?
jack: i was fuckin my wife's cos (see 3rd definition) so hard from the back when bobby came in and took over&then i went out front, hopped in my caddy and ghost rode the whip! i was ghost riding squared!!!
jim: damnnnn thats hot/funny/weird ass