A method of taking drugs,
a slightly incomprhensible pastime,
and excellent British drugs film that made a star of Ewan McGregor (Later Obi-wan in star wars for those of you who don't watch things without CG.)
Trainspotting the pastime has been identified as a kind of autism, or so I hear.
"Man, I been trainspottin' all night!"
"Ooh look, a twelve tonne sprinter with customised rivets"
"Choose life, choose a job, choose..."
(v.) the act of searching for a drug user by the scar tissue.
Scars usually follow the path of the veins, primarily along the arms. The scars are called tracks. This returning to the act of locating the drug user, finding out where one can procure a drug.
Person A: What are you doing?
Person B: Trainspotting; ...and there's a guy with track marks! I'll go ask him where he scored his gear.
Person A: he looks like he's hanging out, don't buy anything from him!
Trainspotting is A Hobby where people go and see or film Trains. You see a lot of people with note pads writing down train numbers. And some young people with tripods and cameras waving like mad the drivers to get them to Honk. This is avery rare hobby know a days and is a very fun thing to do.