1) Terrorism tactic 
A car bomb, or truck bomb, also known as a Vehicle Borne Improvised Explosive Device (VBIED), is an improvised explosive device placed inside a car or other vehicle and then detonated. It is commonly used as a weapon of assassination, terrorism or guerrilla warfare, to kill the occupants of the vehicle, people near the blast site, or to damage bui...
[n] - a bomb placed in a car and wired to explode when the ignition is started or by remote control or by a timing device
noun a bomb placed in a car and wired to explode when the ignition is started or by remote control or by a timing device