sit on (one's) tail

sit on (one's) tail

To follow close behind one, especially in a car. Why is this guy sitting on my tail when I'm already going over the speed limit? I sat on his tail for nearly 30 minutes before I finally had a chance to pass him.
See also: on, sit, tail
Farlex Dictionary of Idioms.

sit on someone's tail

drive extremely close behind another vehicle, typically while waiting for a chance to overtake.
See also: on, sit, tail
Farlex Partner Idioms Dictionary
See also:
  • sit on someone's tail
  • be (sitting) on (one's) tail
  • on (one's) tail
  • on somebody's tail
  • on someone’s tail
  • on tail
  • on your tail
  • Get off my tail!
  • get off one's tail
  • get off tail