Source : Free On-Line Dictionary of Computing

newsfroup
     
         A silly synonym for {Usenet} {newsgroup},
        originally a typo but now in regular use on {Usenet}'s
        {news:talk.bizarre} and other lunatic-fringe groups.
     
        Compare {hing}, {grilf}, and {filk}.
     
        [{Jargon File}]
     
        (1994-12-13)