An exclamation expressing disgust or revulsion at something unpleasant, gross, or repulsive.
An onomatopoetic word that emerged in informal English, possibly related to 'yuck' or 'ugh.' It's an imitative word representing the sound of gagging or disgust, popularized in the 20th century.
The word 'yuk' is almost the sound your body makes when you find something disgusting—it's brilliantly onomatopoetic because saying 'yuk' actually makes the sound of gagging! It's completely informal and child-like, which is probably why it's been banned from some school newspapers, yet it's so universal that people across different English-speaking countries say it identically.
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