The Collaborative International Dictionary of English v.0.48:

Spatter \Spat"ter\, v. t. [imp. & p. p. Spattered; p. pr. &
   vb. n. Spattering.] [From the root of spit salvia.]
   1. To sprinkle with a liquid or with any wet substance, as
      water, mud, or the like; to make wet of foul spots upon by
      sprinkling; as, to spatter a coat; to spatter the floor;
      to spatter boots with mud.
      [1913 Webster]

            Upon any occasion he is to be spattered over with
            the blood of his people.              --Burke.
      [1913 Webster]

   2. To distribute by sprinkling; to sprinkle around; as, to
      spatter blood. --Pope.
      [1913 Webster]

   3. Fig.: To injure by aspersion; to defame; to soil; also, to
      throw out in a defamatory manner.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spatter \Spat"ter\, v. i.
   To throw something out of the mouth in a scattering manner;
   to sputter.
   [1913 Webster]

         That mind must needs be irrecoverably depraved, which,
         . . . tasting but once of one just deed, spatters at
         it, and abhors the relish ever after.    --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

spatter
    n 1: the noise of something spattering or sputtering
         explosively; "he heard a spatter of gunfire" [syn:
         spatter, spattering, splatter, splattering,
         sputter, splutter, sputtering]
    2: the act of splashing a (liquid) substance on a surface [syn:
       spatter, spattering, splash, splashing,
       splattering]
    v 1: dash a liquid upon or against; "The mother splashed the
         baby's face with water" [syn: spatter, splatter,
         plash, splash, splosh, swash]
    2: rain gently; "It has only sprinkled, but the roads are slick"
       [syn: sprinkle, spit, spatter, patter, pitter-
       patter]
    3: spot, splash, or soil; "The baby spattered the bib with food"
       [syn: spatter, bespatter]