YUCKY
disgusting, disgustful, distasteful, foul, loathly, loathsome, repellent, repellant, repelling, revolting, skanky, wicked, yucky
(adjective) highly offensive; arousing aversion or disgust; “a disgusting smell”; “distasteful language”; “a loathsome disease”; “the idea of eating meat is repellent to me”; “revolting food”; “a wicked stench”
Source: WordNet® 3.1
Etymology
Adjective
yucky (comparative yuckier, superlative yuckiest)
(colloquial, often, childish) Of something highly offensive; causing aversion or disgust.
Synonyms
• disgusting
• distasteful
• foul
• gross
• loathsome
• nasty
• offensive
• repugnant
• revolting
• unpleasant
• wicked
Antonyms
• yummy
Source: Wiktionary