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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   jock
   systems jock
      1. A programmer who is characterised by large and somewhat
      brute-force programs.
      2. When modified by another noun, describes a specialist in
      some particular computing area.  The compounds "compiler jock"
      and "systems jock" seem to be the best-established examples.
      [Jargon File]
      (1995-01-19)