You are a loiterer, hanging around on the subway platform. You know perfectly well that this is against the rules, but the rules are pretty stupid. And you have good reason to be here, so they can stuff the rules.
You are A skateboard punk. You're about fourteen years old, and you're out on school vacation today. (Well, that's what you're telling people, anyway.) Your greatest joy in life is shooting around on your skateboard. A few weeks ago, you realized that the T platform is one of the better places to do this -- a long straight shot, with stairs and railings around, and lots of people to weave through. You don't mind them, so long as they don't get in your way too much.
A T pass (T Pass) -- A plastic card that looks much like a credit card. Gives the owner the right to ride the T as much as he or she wants for a month.
A skateboard (Skateboard) -- A wicked-looking board, with high-quality, lovingly-maintained ball brearings and wheels. The board is painted with flames and demons all over it, a melange of blacks and reds that would make Hieronymous Bosch blush.
Can ride skateboards (Skateboard Riding) -- This person is a skilled skateboard rider, capable of making the board race along just where he wants. Can ride the board down stairs with ease, do jumps, and things like that.
Annoying (Annoying) -- This person is just plain irritating. He or she gets in the face of everyone around, and cares little enough about others that you have to wonder if they're a little sociopathic. But no: it's more just a matter of being a selfish jerk than any real mental illness. This disability should be roleplayed to the hilt.