wabbit

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 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}.