1. a person who hovers around a performing djs
and attempts to identify his tracks by label, artist, and or song title, in an attempt to search out and perform the same set. Trainspotter can also be used as a verb, as in "I caught that douche bag trainspotting
"yo,dj, that was a dope set you dropped last week, I heard such and such play the same set last night at(insert club name here), he is such a trainspotter !!!"