Definition of slugger noun from the Oxford Advanced American Dictionary

     

    slugger

     noun
    noun
    NAmE//ˈslʌɡər//
     
    (informal)
     
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  1. 1(in baseball) a player who hits the ball, especially one who hits it very hard and for long distances
  2. 2 (approving) used when speaking to or about someone, especially a young boy, who tries really hard at something, and that you feel affection for Hang in there, slugger. You can do it!
See the Oxford Advanced Learner's Dictionary entry: slugger