The OED has admitted a rare word of power into its pages. Aiyo!

If you speak any of the Dravidian languages spoken in India or, if you live in Malaysia or Singapore, ‘aiyo’ is a very familiar term normally used to express shock, disappointment or even dread. It’s flexibility and versatility is perhaps second only to the suffix ‘lah’ which is commonly found in many South East Asian colloquial speech.

Together with other terms such as the Internet slang ‘yolo’, ‘aiyo’ is now part of the dictionary which now contains more than 890,000 words from the English-speaking world.

Source: Oxford English Dictionary Quietly Adds Tamil Slang ‘Aiyo’ - Newser