ride (someone's) ass(redirected from rides their ass)
ride (someone's) ass
1. To frequently or constantly harass, nag, or upbraid someone to do, accomplish, or complete something. The boss is riding everyone's ass to get the project finished by next week. Quit riding my ass, I'll get it done eventually!
2. To tailgate, i.e. to follow unnecessarily closely behind another vehicle while driving. I wish that trucker wouldn't ride my ass down this hill.