Definition of car bomb:
(n) :
An automobile laden with a large amount of explosives, and used as a bomb primarily in order to cause external damage.
(n) :
An explosive device installed in an automobile with the primary purpose of killing the occupants of the car.
(n) :
(slang) Flatulence in an enclosed automobile.
(n) :
An alcoholic beverage made by dropping a shot of liquor into a glass of beer.