joyrider       
noun [ C ] UK uk/ˈdʒɔɪˌraɪ.dər/ us/ˈdʒɔɪˌraɪ.dɚ/
 (用偷来的车)开快车兜风的人
a person who drives fast and dangerously for pleasure, especially in a stolen vehicle
  He was hit by a car that was being driven by joyriders. 他被开着偷来的车兜风的人撞了。 
 The police officers ordered the joyriders out of the car.
 See: joyriding
 - More examples
 - Juvenile joyriders are responsible for a high number of the thefts in the region.
 - Police told me that the car was probably taken by joyriders.
 - Vehicles are not stolen for parts but by joyriders who abandon them later.