Source : Free On-Line Dictionary of Computing

lion food
     
         (IBM) Middle management or HQ staff, or, by
        extension, administrative drones in general.  The term derives
        from an old joke:
     
        Two lions escape from the zoo and split up to increase their
        chances.  When they finally meet after two months, one is
        skinny and the other overweight.  The thin one says, "How did
        you manage?  I ate a human just once and they turned out a
        small army to chase me with guns and nets, it was terrible.
        Since then I've been reduced to eating mice, insects, even
        grass."  The fat one replies: "Well, *I* hid near an IBM
        office and ate a manager every day.  Nobody even noticed!"
     
        [{Jargon File}]
     
        (1994-12-01)