Source : Free On-Line Dictionary of Computing

frob
     
        /frob/ 1.  [MIT] The {TMRC} definition was "FROB = a
        protruding arm or trunnion"; by metaphoric extension, a "frob"
        is any random small thing; an object that you can comfortably
        hold in one hand; something you can frob (sense 2).  See
        {frobnitz}.
     
        2. Abbreviated form of {frobnicate}.
     
        3. [{MUD}] A command on some {MUD}s that changes a player's
        experience level (this can be used to make wizards); also, to
        request {wizard} privileges on the "professional courtesy"
        grounds that one is a wizard elsewhere.  The command is
        actually "frobnicate" but is universally abbreviated to the
        shorter form.
     
        [{Jargon File}]