1) Arousing aversion or disgust 2) Disgustful 3) Disgusting 4) Distasteful 5) Foul 6) Full of bad taste 7) Gross 8) Highly offensive 9) Loathly 10) Loathsome 11) Offensive 12) Repellant 13) Repellent 14) Repelling 15) Revolting 16) Skanky 17) Slang for horrid, nasty 18) Totally gross 19) Wicked 1) Awful 2) Bad 3) Disgustful 4) Disgusting 5) Foul 6) Gross 7) Icky 8) Loathly 9) Nasty 10) Repelling 11) Revolting 12) Skanky 
Yucky is slang for horrid, nasty.
thoroughly unappetizing, disgusting, or repugnant.