The Collaborative International Dictionary of English v.0.48:

Smutch \Smutch\, n. [Prob. for smuts. See Smut, n.]
   A stain; a dirty spot. --B. Jonson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Smutch \Smutch\, v. t. [imp. & p. p. Smutched; p. pr. & vb. n.
   Smutching.]
   To blacken with smoke, soot, or coal. [Written also
   smooch.] --B. Jonson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

smutch
    v 1: make a smudge on; soil by smudging [syn: smear, blur,
         smudge, smutch]