WordNet (r) 3.0 (2006):

rubbishy
    adj 1: cheap and inferior; of no value; "rubbishy newspapers
           that form almost the sole reading of the majority";
           "trashy merchandise" [syn: rubbishy, trashy]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "rubbishy":
   Pickwickian, absurd, base, beggarly, beneath contempt, cheap,
   cheesy, common, contemptible, crummy, despicable, foolish, gaudy,
   gimcracky, mean, meretricious, miserable, nonsensical, paltry,
   pathetic, pitiable, pitiful, poor, poppycockish, sad, scrubby,
   scruffy, scummy, scurvy, scuzzy, shabby, shoddy, silly,
   skimble-skamble, sleazy, sorry, tatty, trashy, trumpery, twaddling,
   twaddly, two-for-a-cent, two-for-a-penny, twopenny,
   twopenny-halfpenny, valueless, vile, worthless, wretched