"That's gross!” (3)
(Other definitions for yuck that I've seen before include "Expression of disgust; rhymes with male deer" , "Exclamation of disgust" , "Ugh!" , "Disgusting (interj.)" , "That's disgusting!" .)
(Other definitions for ugh that I've seen before include "expression of revulsion" , "Yuck (colloq.)" , "How repulsive!" , "Exclamation of horror" , "That's disgusting!" .)