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trainspotterish

British  
/ ˈtreɪnˌspɒtərɪʃ /

adjective

  1. informal  obsessed with trivial details, esp of a subject generally considered uninteresting

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Everything that was magical, mysterious and half alluded to, he now ploddingly dramatised, making it seem dull and trainspotterish.

From The Guardian