Let's Ride

Doctor's Advocate Game, The
He's simply saying that Eminem's lyrics start beef and drama and are drama filled
when you add an amplifier and subwoofer speakers to a car stereo system the loud bass often rattles the rear license plate, which is held on with two screws. if your sound system was really expensive and loud, you could possibly rattle the car this much.
Shake your bottom up and down like hydraulics which are commonly seen on vehicles driven by those in gangs and/or affiliated with their lifestyle.
Riding in a car fixed with a hydrolic system that allows one wheel to be raised so it lifts another off the ground keeping only three wheels in contact with the pavement. This can also cause the back or ass of the car to scrape due to the harsh angle