Busterbating
The act of masturbating on public transportation in view of other riders. Can be performed by a bus bandit or even by a driver or conductors. For an extra thrill, you can also videotape yourself and post the videos later online for others to enjoy. The solo version of a bus job.
"I was on my way to work this morning and the guy in front of me was either busterbating or he had one nasty case of crabs."