Any of the locomotives from the caboose family.
A synonym of train
This definition stems from the suspicion that the Jonas Brothers run the train on Miley Cyrus/Hannah Montana every night, after each show of her Best of Both World tour. The practice of running the train is conveniently made possible hugely because the Jonas Brothers are the opening act on her tour and are considered extremely gavnasty
by today's many young teenagers, thus making it more likely for the seemingly innocent pop star to give it up