The Vietnamese word "êu" is an informal expression used to convey disgust or disappointment, similar to saying "ew" in English when something is unpleasant or dirty. It can be used to describe something that is very dirty, disgusting, or distasteful.
"êu" is a versatile and expressive word in Vietnamese that helps convey feelings of disgust or distaste. It is often used informally and can be emphasized by repeating it.