(~s, tailgating, ~d)
1.
A ~ is a door at the back of a truck or car, that is hinged at the bottom so that it opens downwards.
N-COUNT
2.
If you ~ someone, you drive very closely behind them.
Perhaps the fact that the car was tailgating him made him accelerate...
Police pulled him over doing 120km/h, making rapid changes and tailgating.
VERB: V n, V