modified
unpalatable, uneatable, tasteless, unsavory, unappetizing, not fit to eat, bad, spoiled, rotten, rancid, turned, tainted, sour, bitter, sickening, disagreeable, nauseating, unpleasant-tasting, foul-tasting, indigestible, unwholesome, harmful, poisonous, contaminated, not fit for human consumption, yukky*; see also indigestible, offensive 2, rotten 1.
Antonyms edible, appetizing, delicious.