TLK if teh other person is in their mid 30s to late 30s. I don't think it's wrong to call them uncle or aunty. I'm 21 and I would find it rude to call them by their first name. Addressing someone by uncle or aunty is a form of respect in our culture ( in my opinion).
that is why I said that MKD ..
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I am not talking about you calling me chachu or like that. I am talking about when the words are used in insulting manner
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