An individual (usually a male with a small penis) lifts (jacks up) his truck and puts huge tires on it for the purpose of "offroading" With the intention of being "cool" however they only drive on asphalt and around mall parking lots. Usually included is the following; cigarettes, dip, baseball hats, bad tattoos, being loud, and cheap beer.
An object, usually a rock, that hits the front of your car. As these projectiles are usually unavoidable, any scratch or dent they may make must be accepted as a scar of city driving.