exclamation of disgust, 1966, origin perhaps echoic (cf. Newfoundland slang yuck "to vomit," 1963).
"laugh," 1938, yock, probably imitative.
An exclamation of disgust: ''Those women on the PBS specials seem to love it.'' ''Yuck,'' Connie mugged (1969+)
A disgusting substance, person, or thing; someone or something nasty: precipitation in the form of rain, snow, and assorted other atmospheric yuck/ clean all the yecch out of her system/ Mario is an intellectually dishonest person. He's just yecch (1943+)
[perhaps echoic of gagging or vomiting]