sit on (one's) tail

(redirected from sitting on someone's tail)
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sit on (one's) tail

To follow close behind someone or something, 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

sit on someone's tail

drive extremely close behind another vehicle, typically while waiting for a chance to overtake.
See also: on, sit, tail