Where "Arvo" Comes From
"Arvo" was formed by clipping "afternoon" and adding the "-o" suffix — one of the most productive word-formation patterns in Australian English. The suffix originated from nautical and worksite calls such as "smoke-oh!" where "-oh" was appended to project a hail over distance. In Australian English it evolved into a general colloquialising suffix conveying a robust, familiar tone. The Australian National Dictionary records "arvo" from the 1920s.
The "-o" suffix was studied by linguist Roly Sussex, who described it as part of a broader Australian tendency toward informal, rhythmically satisfying alternatives to standard words. "Arvo" is now so firmly embedded that many speakers use it without any awareness of the shortening — it is simply the word for afternoon.
Source: Wikipedia — “Australian English”
"See ya this arvo at the barbie!"
How Aussies Actually Use It
"Arvo" is used constantly and without a second thought — in plans ("see you this arvo"), greetings ("g'day, how's your arvo going?"), and everyday small talk about the time of day.
It pairs naturally with other shortenings, as in "Saturday arvo" (sometimes even trimmed further to "sarvo"), and works equally well in casual writing and speech.
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