carjack UK /ˈkɑː(ɹ).dʒæk/US /ˈkɑɹ.d͡ʒæk/ verb2 •To steal an automobile forcibly from (someone).Someone should carjack that pompous jerk and teach him a lesson! •To forcibly steal (a vehicle).These twerps have carjacked their last Mercedes. formscarjacked · carjacking · carjacks