an explosive charge, either a kamibomb or plastique, that is placed inside a car and detonated by timer, remote control or (the classic) when the car's ignition is activated
A smaller version of a truck bomb. [SMB
A car bomb is an improvised explosive device that is placed in a car or other vehicle and then exploded. It is commonly used as a weapon of assassination, terrorism, or guerrilla warfare, to kill the occupant(s) of the vehicle and people near the blast site and/or to cause damage to buildings or other property. Car bombs act as their own delivery mechanisms and can carry a relatively large amount of explosives without attracting suspicion.