What is the expression of disgust in your country?

In British English you'll most likely hear "YUCK" or "URGH" while over the border in Wales "YCH A FI" gets heard.

So when you see something disgusting what's your country's sound of revulsion?

American's, does it vary from state to state?
What is the expression of disgust in your country?
What is the expression of disgust in your country?
What is the expression of disgust in your country?
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