O

oi
hey.

As in "Oi! Stop that!" Not oy. Oy is from oy vey. Oi is from oi.

Old Dart, the
England or the whole of the UK.

old money, the
Australian currency pre-1966

We changed from pounds, shillings and pence (British money) to dollars in 1966.

"The old money" is also used to refer to imperial measurements:
Davo: "Ninety millimetres."
Simmo: "What's that in the old money?"
Davo: "Thirty five and three eighths inches."

onya
good on you, you go girl!, High five! Congratulations!

orright
all right

Bazza: "Davo. How you going?"
Davo: "Orright. You?"

Our Kylie
Kylie Minogue also known as the Singing Budgie

An Australian pop princess, her music is big with disco bunnies. A mate of mine went to war in Iraq with Kylie on his iPod. It ain't all death metal in the army.