Oi! Oi! Oi!

Used by Australians in most of the circumstances where americans may chant U-S-A U-S-A.
This may be at one of the frequent moments of a fantastic sporting performance by an Aussie, or when nothing's happening.
Believed to have been derived from the Welsh 'Oggie Oggie Oggie - Oi Oi Oi!', which might actually mean something...
Seems to have peaked during the 2000 sydney olympics.
Occasionally repeated several times consecutively, the 'Oi' chorus growing louder with each calling.

An exclamation followed by the response: Oi! Oi! Oi!

Made by Australians when feeling particularly patriotic especially during sporting events.

Also heard frequently voiced by Australians overseas. For example, when visiting Aussie themed pubs in London, England.

Exact origin unknown but early instances were observed during Olympic swimming events prior to 2000.