Source : Webster's Revised Unabridged Dictionary (1913)

Sullage \Sul"lage\, n. [Cf. {Suillage}, {Sulliage}.]
   1. Drainage of filth; filth collected from the street or
      highway; sewage. [Obs.]

            The streets were exceedingly large, well paved,
            having many vaults and conveyances under them for
            sullage.                              --Evelyn.

   2. That which sullies or defiles. [Obs.]

            It is the privilege of the celestial luminaries to
            receive no tincture, sullage, or difilement from the
            most noisome sinks and dunghills here below.
                                                  --South.

   3. (Founding) The scoria on the surface of molten metal in
      the ladle.

   4. (Hydraul. Engin.) Silt; mud deposited by water.

   {Sullage piece} (Founding), the sprue of a casting. See
      {Sprue}, n., 1
      (b) .