Source : Free On-Line Dictionary of Computing

flame on
     
         To begin or continue to {flame}.  The
        punning reference to Marvel Comics's Human Torch is no longer
        widely recognised.
     
        The phrase "flame on" may actually precede the flame, in which
        case "flame off" will follow it.
     
        See {rave}, {burble}.
     
        [{Jargon File}]
     
        (1996-10-29)