A beat-up old jalopy of a car.
I waved goodbye as she backed out of my driveway in her junker Mercury Sable.
Landed aristocracy of Prussia and Eastern Germany. "Junker" in German means country squire. The particle "von" before their family names indicated their belonging to the nobility.
Otto von Bismarck and Paul von Hindenburg are famous Junkers. (pronounced YOON-ker)