sit on (one's) tail(redirected from sit on their tails)
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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.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
sit on someone's taildrive extremely close behind another vehicle, typically while waiting for a chance to overtake.
Farlex Partner Idioms Dictionary © Farlex 2017