Source : Free On-Line Dictionary of Computing

flarp
     
        /flarp/ [Rutgers University] Yet another {metasyntactic
        variable} (see {foo}).  Among those who use it, it is
        associated with a legend that any program not containing the
        word "flarp" somewhere will not work.  The legend is
        discreetly silent on the reliability of programs which *do*
        contain the magic word.
     
        [{Jargon File}]