Source : Free On-Line Dictionary of Computing

FISH queue
     
         (By analogy with {FIFO} - first-in, first-out) first
        in, still here.
     
        A joking way of pointing out that processing of a particular
        sequence of events or requests has stopped dead.  Also "FISH
        mode" and "FISHnet"; the latter may be applied to any network
        that is running really slowly or exhibiting extreme flakiness.
     
        [{Jargon File}]
     
        (1994-12-01)