Tailgater (noun)

A person who drives close behind another vehicle, especially in an aggressive or dangerous manner.

Origin:

1970s, from tailgate + -er.

Examples:

1. The tailgater was driving so close to the car in front of him that it was difficult to see his license plate.
2. The tailgater was honking and flashing his lights, trying to get the car in front of him to move faster.
3. The tailgater was a reckless driver, who seemed to take pleasure in intimidating others on the road.
4. The tailgater was causing a dangerous situation, as he was making it difficult for other drivers to react to sudden stops or turns.
5. The tailgater was eventually pulled over by the police, who gave him a citation for following too closely.