Source : Free On-Line Dictionary of Computing

language lawyer
     
        A person, usually an experienced or senior software engineer,
        who is intimately familiar with many or most of the numerous
        restrictions and features (both useful and esoteric)
        applicable to one or more computer programming languages.  A
        language lawyer is distinguished by the ability to show you
        the five sentences scattered through a 200-page manual that
        together imply the answer to your question "if only you had
        thought to look there".
     
        Compare {wizard}, {legal}, {legalese}.
     
        [{Jargon File}]
     
        (1995-02-15)