tailgate
noun
°A hinged board or hatch at the rear of a vehicle that can be lowered for loading and unloading; a tailboard.
°The hinged rear door of a hatchback.
verb
°To drive dangerously close behind another vehicle.
°To follow another person through access control on their access, rather than on one’s own credentials. Especially when entering a door controlled by a card reader.
synonyms: piggyback