WordNet (r) 3.0 (2006):

scruffy
    adj 1: shabby and untidy; "a surge of ragged scruffy children";
           "he was soiled and seedy and fragrant with gin"- Mark
           Twain [syn: scruffy, seedy]

Moby Thesaurus II by Grady Ward, 1.0:

111 Moby Thesaurus words for "scruffy":
   abject, abominable, arrant, atrocious, base, beggarly,
   beneath contempt, cheap, cheesy, common, contemptible, crummy,
   debased, degraded, depraved, despicable, dingy, dirty, disgusting,
   dowdy, down-at-heel, down-at-the-heels, dusty, execrable, flagrant,
   foul, frayed, frazzled, full of holes, fulsome, gaudy, gimcracky,
   grave, grimy, gross, grubby, grungy, heinous, holey, in rags,
   in shreds, in tatters, little, low, low-down, lumpen, mangy, mean,
   measly, meretricious, messy, miry, miserable, monstrous,
   moth-eaten, muddy, nefarious, obnoxious, odious, paltry, patchy,
   pathetic, petty, pitiable, pitiful, poky, poor, ragged, raggedy,
   rank, ratty, reptilian, rubbishy, run-down, sad, scabby, scrubby,
   scummy, scurvy, scuzzy, seedy, shabby, shoddy, slovenly, small,
   smirchy, smoky, smudgy, smutchy, smutty, snuffy, sooty, sorry,
   squalid, tacky, tattered, tatty, threadbare, torn, trashy,
   trumpery, two-for-a-cent, two-for-a-penny, twopenny,
   twopenny-halfpenny, unmentionable, untidy, valueless, vile,
   worthless, wretched