1. (noun)smudge, spot, blot, daub, smear, smirch, slur a blemish made by dirt "he had a smudge on his cheek"
2. (verb)blot, smear, smirch, spot, stain an act that brings discredit to the person who does it "he made a huge blot on his copybook"
3. (verb)smirch, besmirch smear so as to make dirty or stained
4. (verb)defame, slander, smirch, asperse, denigrate, calumniate, smear, sully, besmirch charge falsely or with malicious intent; attack the goodname and reputation of someone "The journalists have defamed me!" "The article in the paper sullied my reputation"
Definitions of smirch 
