Source : Free On-Line Dictionary of Computing

This time, for sure!
     
         Ritual affirmation frequently uttered during
        protracted {debugging} sessions involving numerous small
        obstacles (e.g. attempts to bring up a {UUCP} connection).  For
        the proper effect, this must be uttered in a fruity imitation
        of Bullwinkle J. Moose.
     
        Also heard: "Hey, Rocky!  Watch me pull a rabbit out of my
        hat!"  The {canonical} response is, of course, "But that trick
        *never* works!"
     
        See {hacker humour}.
     
        [{Jargon File}]
     
        (1995-09-27)