Source : Free On-Line Dictionary of Computing

Missed'em-five
     
         (Or "SysVile" /sis-vi:l'/) A
        pejorative hackerism for AT&T {System V} {Unix}, generally
        used by {BSD} partisans in a bigoted mood.
     
        See {software bloat}, {Berzerkeley}.
     
        [{Jargon File}]
     
        (1998-07-01)