Source : Free On-Line Dictionary of Computing

eat flaming death
     
        A construction popularised among hackers by the infamous {CPU
        Wars} comic; supposedly derive from a famously turgid line in
        a WWII-era anti-Nazi propaganda comic that ran "Eat flaming
        death, non-Aryan mongrels!" or something of the sort (however,
        it is also reported that the Firesign Theater's 1975 album "In
        The Next World, You're On Your Own" included the phrase "Eat
        flaming death, fascist media pigs"; this may have been an
        influence).  Used in humorously overblown expressions of
        hostility. "Eat flaming death, {EBCDIC} users!"
     
        [{Jargon File}]