Definitions
1.verbTo drive dangerously close behind another vehicle."That idiot has been tailgating me for the last five minutes."
2.verbTo 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.
3.verb(of a broker) To privately purchase or sell a security immediately after trading in the same security for a client.
4.verbTo have a tailgate party.
5.nounThe act of driving dangerously close behind another vehicle.
6.nounA tailgate party (social event held on and around the open tailgate of a vehicle)