Definition of 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 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.