Although English is Australia's official language, when Australians speak to each other, they use a lot of made-up words and expressions which are a kind of 'code'. You may have heard some of these before, especially if you have seen Australian movies or television shows. Australian slang is sometimes called 'Strine', which is a what some Australians call each other… it's short for the way a true-blue Aussie pronounces 'Australian'… like 'Aw-strine'!

Arvo: Afternoon. 
Avos: Avocados. 
Avago You Mug: Shout of encouragement to a sportsman not performing to his best 
Banana bender: A Queenslander. 
Barbie: Barbecue, as in "I'll throw some shrimp and chook on the barbie." 
Bash: Party. Also "fancy turns". 
Bonzer: Pronounced "bonsa" - grouse, great, excellent. 
Bloke: Man, guy. 
Bludger: Lazy person, layabout. 
Bluey: (also known as Blue) Slang for any bloke with red hair, and also known to describe the Australian Cattle Dog. 
Bonnet: Hood of a car. 
Boomer: A large male kangaroo, as Rolf Harris sings, "Six white boomers, snow white boomers on Santa's Australian run...". 
Boot: Trunk of a car. 
Bottle shop: Liquor shop. 
Box of blowflies: Ugly, as in "that's as ugly as a box of blowflies!" And that's pretty ugly! 
Buckley's Chance: No chance at all. 
Bung: To put or place. E.g bung another snag on the barbie 
Bunyip: A mythical bush spirit, Australia's bigfoot. Probably just a hairy surfie! 
Capsicums: Green or red bell peppers. 
Carpetbagger steak: Beef stuffed with oysters. 
Chemist shop: Drug store. 
Chew the Fat: To talk, engage in pleasant conversation, to have a chinwag. 
Chook: Chicken. Often served barbecued at fancy turns. If your hostess is befuddled and/or overcome by trying to do too many things at once, one might say she was "running around like a chook with its head cut-off!" 
Cockie: Farmer. 
Cockroach: Someone from New South Wales 
Crook: Sick, or badly made. 
Crow eater: A South Australian. 
Dag: A funny person, nerd, goof, loser. 
Digger: A soldier. 
Dilly-bag: Food bag. 
Ding bat: Fool. 
Dinky-di: The real thing. 
Donk: Car or boat engine. 
Donkey's years: Ages. 
Drop-in: To steal a surfer's wave. This is a serious crime in Surfer's Paradise. 

Earbash: Non-stop chatter. 
Esky: Portable icebox or cooler - it's always a good idea to have one in the boot stocked with some cold ones just in case the party's bar runs dry. 
Fair Dinkum: Kosher, the real thing - as in "Fair Dinkum Aussie" (true blue Aussie original). Often used by itself as a rhetorical question to express astonishment verging on disbelief ... "Fair Dinkum, mate?" (you've got to be kidding, haven't you?) 
Fair go: A good chance 
Footpath: Sidewalk. 
Footy: Rugby League 
Flyer: female kangaroo 
Galah: Noisy fool, named after the bird of the same name. 
Game: Brave. 
G'arn: Go on, you're kidding! 
G'day: Universal greeting, used anytime day or night, but never as a farewell. Pronounced "gud-eye", usually followed by "mate" (mite) or a typically strung-together "howyagoinallright"(= how are you today, feeling pretty good?) 
Give it a burl: Try it. 
Good as gold: Great! 
Good oil: Useful information, a good idea. 
Good Onya: Omnipresent term of approval, sometimes ironic, offering various degrees of heartfelt congratulations depending on inflection. Indispensible during Aussie smalltalk - substitute "really, oh yeh, aha, etc." 
Grizzle: To complain. 
Grouse: Rhymes with "house" - means outstanding, tremendous. Can be applied 
universally to all things 
social ... "grouse birds (women), grouse band, in fact, grouse bloody gay and hearty (great party!)" 
Have a yarn: To talk to someone. 
Hit your kick: Open your wallet. 
Hooroo: Pronounced "who-ru"... means "see ya later", make sure you don't say g'day when meaning goodbye - it's a dead giveaway you're not a true blue Aussie. 
Hotel: Often just a pub. 
Icy pole: Popsicle. 
Jackaroo: A male ranch hand. 
Jillaroo: A female ranch hand. 
Joey: Baby kangaroo. 
Journo: Journalist. 
Jumbuck: Sheep. 
Jumper: Sweater. 
Knock: To criticise.
Lemon squash: Lemonade. 
Lob-in: Drop in to see someone. 
Lollies: Sweets. 
Lolly water: Soft drink. 
Never Never: Distant outback. 
No-hoper: A fool, loser 

Offsider: An assistant. 
O.S.: Overseas, as in "she's gone O.S." 
Oz: Australia; God's country 
Pines: Pineapples. 
Pommie or pom: An Englishman. 
Rafferty's rules: Chaos, disorder. 
Reckon: Think, as in "Your shout or mine? What' ya reckon?". 
Ridgy-didge: Original, genuine. 
Right: Okay, as in "she'll be right, mate." 
Ring, tingle: Phone someone up, as in "I'll give him a ring." 
Ripper: Pronounced "rippa" means beaut, tippy-tops, grouse 
Rubbish: To knock something. 
Sandgroper: A Western Australian. 
Shark biscuit: New surfers, grommets on boogie boards. Tres uncool! 
Sheila: A woman 
She'll be right: No problem, don't worry, mate. 
Shootin' through: Leave, take off. 
Smoko: Smoke or coffee break. 
Snag: A sausage. 
Sook: Someone who complains a lot 
Spit The Dummie: A "dummie" is Australian for a child's pacifier. Lose your cool 
Stickybeak: Nosy person. 
Stone the crows: An exclamation of surprise. 
Strewth: Pronounced "sta-ruth" ... general exclamation of disbelief or shock. 
Strine: Australian slang, from "Aus-strine", the way Aussies say Australian. 
Swagman: Itinerant farm worker, tramp 
Taswegian: A resident of Tasmania. 
Tee-up: To set up an appointment. 
Tomato sauce: Ketchup. 
Too right: Definitely! 
True blue: Honest, straight. 
The Lucky Country: Why, Australia, of course. 
Tucker: Food. 
Vegemite: A dark brown, gooey, salty vegetable yeast extract. It's what makes Aussies strong. 
Wally: Idiot 
Whinge: Rhymes with "hinge" as in door! Means to complain incessantly 
Woopwoop: in the boonies, nowhere. 
Wowser: Straight-laced person, prude, puritan, spoilsport. 
Yabber: Talk. 
Yobbo: An uncouth person.

     (Queensland australia News, Aussie Terms and Expressions)