'Arvo' is a colloquial term commonly used in Australia and New Zealand to refer to the afternoon or the later part of the day. There are many synonyms for 'arvo' that have been used in different parts of the world. Some commonly used alternatives include 'PM' or 'post meridiem,' 'evening,' 'dusk,' 'twilight,' and 'sunset.' Other slang or informal terms also exist, including 'late afternoon,' 'after lunch,' 'the second half of the day,' or simply 'afternoon.' The term 'arvo' has been widely accepted and recognized, and it has become a part of popular culture, especially in the countries where it is used.