Synonyms of yucky

1 Syllable
vile, foul, gross, fouls, mung
2 Syllables
fouled, grisly, dungy, funky, hard-time, straggly, dreggy, odious, lousy, rotten, munger, crummy, nastier, crappy, cruddy, sleazy, unswept, grody, icky, foulest, fouler, scuzzy, dirty, stinking, fetid, awful, raunchy, hideous, dirtier, nasty, nastiest, creepy, skanky, yecchy, vulgar, beastly, dirtiest
3 Syllables
loathsome, gruesome, repugnant, sleazeball, noisome, unpleasant, sickening, revolting, disgusting, nauseating
4 Syllables
inedible, distasteful, detestable, unlaundered, repulsive, offensive
5 Syllables
insalutary, unpleasant-tasting, abominable, unappetizing