Source : Webster's Revised Unabridged Dictionary (1913)

Smirch \Smirch\, v. t. [From the root of smear.]
   To smear with something which stains, or makes dirty; to
   smutch; to begrime; to soil; to sully.

         I'll . . . with a kind of umber smirch my face. --Shak.

Smirch \Smirch\, n.
   A smutch; a dirty stain.

Source : WordNet®

smirch
     n 1: a blemish made by dirt; "he had a smudge on his cheek" [syn:
           {smudge}, {spot}, {blot}, {daub}, {smear}, {slur}]
     2: an act that brings discredit to the person who does it; "he
        made a huge blot on his copybook" [syn: {blot}, {smear}, {spot},
         {stain}]
     v 1: smear so as to make dirty or stained [syn: {besmirch}]
     2: charge falsely or with malicious intent; attack the good
        name and reputation of someone; "The journalists have
        defamed me!" "The article in the paper sullied my
        reputation" [syn: {defame}, {slander}, {asperse}, {denigrate},
         {calumniate}, {smear}, {sully}, {besmirch}]