Wordnet 3.0
ADJECTIVE (1)
1. 
 smeared with something that soils or stains; 
 these words are often used in combination; 
- Example: "oil-smeared work clothes"- Example: "hostile faces smirched by the grime and rust"- Henry Roth- Example: "ink-smudged fingers"
WordNet (r) 3.0 (2006):
smudgy
    adj 1: smeared with something that soils or stains; these words
           are often used in combination; "oil-smeared work
           clothes"; "hostile faces smirched by the grime and rust"-
           Henry Roth; "ink-smudged fingers"
Moby Thesaurus II by Grady Ward, 1.0:
25 Moby Thesaurus words for "smudgy":
   besmirched, blotchy, dingy, dirty, dusty, fuliginous, grimy,
   grubby, grungy, messy, miry, muddy, murky, scruffy, slovenly,
   smirched, smirchy, smoky, smothering, smutchy, smutty, snuffy,
   sooty, suffocating, untidy