Synonyms of crummy

1 Syllable
poor, fest, fer, bad, cheap, mung
2 Syllables
shabby, trashy, dreggy, dungy, straggly, scrubby, yucky, seedy, sub-par, baddest, tristful, tatty, rotten, munger, scrubbier, trashier, shabbier, potest, filthier, crappy, cruddy, soily, third-rate, worthless, unswept, scuzzy, dirty, filthy, grotty, seedier, punker, badder, dirtier, yecchy, cast-down, skanky, filthiest, curer, poter, dirtiest
3 Syllables
inferior, pathetic, second-rate, second-best, verminous, useless, depressed
4 Syllables
contemptible, unlaundered, melancholic, miserable, heavy-hearted
5 Syllables
dilapidated