Source : Webster's Revised Unabridged Dictionary (1913)

Splotch \Splotch\, n. [Cf. {Splash}.]
   A spot; a stain; a daub. --R. Browning.

Source : WordNet®

splotch
     n : an irregularly shaped spot [syn: {blotch}, {splodge}]
     v : blotch or spot