A person who follows behind his/ her spouse, boyfriend or girlfriend all the time.

Driving dangerously close to the vehicle in front of you as to not give the proper car lengths space to be able to stop in time.

1) Usually found around sporting events, they involve beer drinking and BBQ from the back of a pickup truck or SUV.

2) The car that is so close to you in the rear that you can barely see it's headlights. Some people like to quickly brake to scare them off. Pretty annoying, but it's better to move to the right. Nobody likes a Left Lane Dick... unless there is no right lane. In that case, it's time for a Skid Contest.

to follow another vehicle dangerously closely

Drinking lots of beer or makin' food in the parking lot before a sports or other large event, (usually football or a concert.)

2- Following a car too closely with your miniature pickup truck while blasting Eminem on the stereo; a form of overcompensation for economic failure and small genitalia.

To folllow closely behind an individual authorized with a security scan pass to enter an area or building so as to gain unauthorized entrance

Tailgation is shorthand for “Tailgate Nation.” Tailgations are communities of sports fans who congregate in the parking lots of American professional and college sports arenas. They erect tents and fire up barbecues, haul out portable beer pong tables and toss sad bags into little targets….all hours before a major sporting event. Deep South Tailgations, typically seen at SEC football games feature high-end RV’s, HD television screens and lots of fried chicken. Tailgations are defined by the activities and traditions held sacred by any tailgater: among them, BBQ, beer, games, and community. Tailgations grow organically, with traditions being passed down from one generation to the next.

Origin: attributed to sports blogger Jason Maloni, a business of sports expert with Levick Strategic Communications and contributor to the Washington Post sports blog The League

verb
Present participle of tailgate

1. Something that monkeys who have no idea how to properly drive do in which they drive dangerously close to the car in front of them for no apparent reason.

2. Attending a sporting event, but instead of watching it in person or on a TV at home, combining the two by watching said event in the parking lot of the arena/stadium on a TV in the back of a pick-up truck while eating shitty barbecue.