Source : Free On-Line Dictionary of Computing

furrfu
     
         Written-only {rot13} "Sheesh!".  "furrfu" evolved in
        mid-1992 as a response to postings repeating urban myths on
        {newsgroup} {news:alt.folklore.urban}, after some posters
        complained that "Sheesh!" as a response to {newbies} was being
        overused.
     
        (1995-10-25)