Definition of true-blue adjective from the Oxford Advanced Learner's Dictionary

     

    true-blue

     adjective
    adjective
    BrE
     
    ; NAmE
     
     
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  1. 1(British English) strongly supporting the British Conservative Party true-blue Tory voters
  2. 2(especially North American English) being a loyal supporter of a particular person, group, principle, etc.; being a typical example of something a true-blue Californian
See the Oxford Advanced American Dictionary entry: true-blue