Bay Area (northern california) slang. Ghost riding dawhip is when you open your car door and get out and run along the side of your car when it's rolling.
Oh shittt mayn, did you see Mistah Fab ghost ride dawhip in his video for Ghost Ride It? Mistah Fab goes so dumbbb
To put a car into neutral and hop on top of it while bumpin' some freshbeats. Looks especially cool when you get hit by an oncoming car.
"Pardon, good passengers, but I could fancy some Mac Dre right about now. And furthermore, I think I'd like to Ghost Ride The Whip while listening to one of his more agreeable recordings."