wabbit

from Jargon File (4.4.4, 14 Aug 2003)
wabbit
 /wab'it/, n.

   [almost certainly from Elmer Fudd's immortal line "You wascawwy
   wabbit!"]

   1. A legendary early hack reported on a System/360 at RPI and
   elsewhere around 1978; this may have descended (if only by
   inspiration) from a hack called RABBITS reported from 1969 on a
   Burroughs 5500 at the University of Washington Computer Center. The
   program would make two copies of itself every time it was run,
   eventually crashing the system.

   2. By extension, any hack that includes infinite self-replication but
   is not a {virus} or {worm}. See {fork bomb} and {rabbit job}, see also
   {cookie monster}.
    
from The Free On-line Dictionary of Computing (8 July 2008)
wabbit

   /wab'it/ [almost certainly from Elmer Fudd's immortal line
   "You wascawwy wabbit!"]  1. A legendary early hack reported on
   a System/360 at RPI and elsewhere around 1978; this may have
   descended (if only by inspiration) from hack called RABBITS
   reported from 1969 on a Burroughs 55000 at the University of
   Washington Computer Center.  The program would make two copies
   of itself every time it was run, eventually crashing the
   system.

   2. By extension, any hack that includes infinite
   self-replication but is not a {virus} or {worm}.  See {fork
   bomb} and {rabbit job}, see also {cookie monster}.

   [{Jargon File}]
    

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