Carjacking is stealing a car.
An example of to carjack is for a fleeing bank robber to hit a car at a red light and then run over to the car that was hit, demanding that the driver get out of the car, and then driving off with the damaged car.
transitive verbcar·jacked, car·jack·ing, car·jacks or car-jacked or car-jack·ing or car-jacks
Origin of carjackcar + (hi)jack.
(third-person singular simple present carjacks, present participle carjacking, simple past and past participle carjacked)