oi oi oi

Australian cheer
Comes from the word Oi
Aussie and British word for Hey
Also has something to do with punks

Aggressive greeting towards friends.

One of Louis Tomlinson many catchphrases

A loud greeting to be given to freinds in public areas, the louder the better in order to make passers by shit their pants.

1) can be used as a greeting when seeing friends. A friendly and loud greeting to either say "hello" or "how are you"
2) another way of praising someone for an achievement, either sexually or non-sexually. A way of saying "check you out!"

A welcome comment....
Like 'Hey how are ye!?!'
Or 'Hi hi'

When anything dramatic, funny, scandalous etc occurs, one must shout "Oi oi oi oi" to aware the general public about the event occurring. It can also be used as a form of greeting to a friend or colleague. There are different spelling variations such as: "Oye" or "Oui".