An expression of disgust or dislike; to react with disgust to something.
An imitative or onomatopoetic word—it mimics the sound of gagging or expressing disgust. Became standard English slang by the 1960s-70s.
Kids use this word constantly, but linguists love it because 'yuck' is truly onomatopoetic—the word *sounds* like the feeling! Different languages have their own versions (German 'igitt,' Japanese 'buero'), showing how we all make similar sounds when disgusted.
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