Source : Webster's Revised Unabridged Dictionary (1913)

Grub \Grub\, n.
   1. (Zo["o]l.) The larva of an insect, especially of a beetle;
      -- called also grubworm. See Illust. of {Goldsmith
      beetle}, under {Goldsmith}.

            Yet your butterfly was a grub.        --Shak.

   2. A short, thick man; a dwarf. [Obs.] --Carew.

   3. Victuals; food. [Slang] --Halliwell.

   {Grub ax} or {axe}, a kind of mattock used in grubbing up
      roots, etc.

   {Grub breaker}. Same as {Grub hook} (below).

   {Grub hoe}, a heavy hoe for grubbing.

   {Grub hook}, a plowlike implement for uprooting stumps,
      breaking roots, etc.

   {Grub saw}, a handsaw used for sawing marble.

   {Grub Street}, a street in London (now called {Milton
      Street}), described by Dr. Johnson as ``much inhabited by
      writers of small histories, dictionaries, and temporary
      poems, whence any mean production is called grubstreet.''
      As an adjective, suitable to, or resembling the production
      of, Grub Street.

            I 'd sooner ballads write, and grubstreet lays.
                                                  --Gap.