The Rice University Neologisms Database

Over-eager and overly enthusiastic about a pursuit or subject, esp. when that thing should seemingly be trivial or unimportant. A description (bearing a very negative connotation) of someone who puts too much time, effort or emotion into any pursuit (especially schoolwork). But it is used even more frequently – but not exclusively – when the said pursuit is something seemingly inconsequential or something that is not perceived as being “cool” i.e. trading card games, certain video games, etc. INTENSIFIED is also used in this context. Probably derived from the common usage of the word which evolved and became used more and more often to relate to this one particular scenario.