The DICT Development Group

  Crummy \Crum"my\ (kr[u^]m"m[y^]), a.
     1. Full of crumb or crumbs.
        [1913 Webster]
  
     2. Soft, as the crumb of bread is; not crusty.
        [1913 Webster]
  
     3. of very poor quality. [informal]
  
     Syn: bum, cheap, cheesy, chintzy, crummy, punk, sleazy,
          tinny. [WordNet 1.5]

  crummy
      adj 1: of very poor quality; flimsy [syn: bum, cheap,
             cheesy, chintzy, crummy, punk, sleazy, tinny]

  88 Moby Thesaurus words for "crummy":
     abject, abominable, arrant, atrocious, barfy, base, beggarly,
     beneath contempt, bum, cheap, cheesy, common, contemptible, crappy,
     creepy, debased, degraded, depraved, despicable, dirty, disgusting,
     execrable, flagrant, foul, fulsome, gaudy, gimcracky, godawful,
     goshawful, grave, grim, gross, hairy, heinous, icky, little, low,
     low-down, lumpen, mangy, mean, measly, meretricious, miserable,
     monstrous, nefarious, obnoxious, odious, paltry, pathetic, petty,
     pitiable, pitiful, poky, poor, punk, putrid, rank, reptilian,
     rubbishy, sad, scabby, scrubby, scruffy, scummy, scurvy, scuzzy,
     shabby, shitty, shoddy, small, sorry, squalid, stinking, stinky,
     trashy, trumpery, two-for-a-cent, two-for-a-penny, twopenny,
     twopenny-halfpenny, unmentionable, valueless, vile, vomity,
     worthless, wretched, yecchy