Usuallya friend (or acquaintance) who is very cheap in almost every way and won't admit it.
Scott is such a bus rider when it comes to group dinners--he only pays for what he ordered, making the whole "let's just divide the bill so we can go to the party" all but impossible.
Someone with no job,no life ,no real friends riding the bus going no where just to talk to the bus driver for two hours thinking it's a friendship rather than a captive audience.
Dude spent a whole day being a recreational bus rider
The act of sticking your erect penis out of the side of the bus. You can achieve this by either drilling a hole in the side of the bus or by sticking your penis out the window.