Definition of train wreck noun from the Oxford Advanced Learner's Dictionary

     

    train wreck

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1an accident in which a train crashes into something else or comes off the track
  2. 2(informal, figurative) a situation, a person’s life, etc. that people find extremely interesting because it lacks order, is very bad or is unsuccessful She gives a train wreck of a performance in the movie. This guy is a train wreck. compare car crash (2)