From Longman Dictionary of Contemporary Englishyuck‧y/ˈjʌki/adjectiveinformalextremelyunpleasantThey painted the bathroom a yucky green colour.The food was yucky.Examples from the Corpusyucky•I wasfedup with theyuckymouldysiliconeround theedgeandreckonedaproperjob should be done on it.•Jake...
I think, the meaning is the same as English, "devilishly delicious" is the meaning, and yummy ...