A
Ace! : Excellent! Very good! 
Aerial pingpong : Australian Rules football 
Amber fluid : beer 
Ambo : ambulance, ambulance driver
Ankle biter : small child 
Apples, she'll be : It'll be all right 
Arvo : afternoon 
Aussie (pron. Ozzie) : Australian
Aussie salute : brushing away flies with the hand 
Avos : avocados 
 
B
B & S : Bachelors' and Spinsters' Ball - a very enjoyable party usually held in rural areas 
Back of Bourke : a very long way away 
Bail (somebody) up : to corner somebody physically 
Bail out : depart, usually angrily 
Banana bender : a person from Queensland 
Barbie : barbecue (noun) 
Barrack : to cheer on (football team etc.) 
Bastard : term of endearment 
Bathers : swimming costume
Battler : someone working hard and only just making a living 
Beaut, beauty : great, fantastic 
Big Smoke : a big city, especially Sydney or Melbourne
Big-note oneself : brag, boast 
Bikkie : biscuit (also "it cost big bikkies" - it was expensive)
Billabong : an ox-bow river or watering hole 
Billy : teapot. Container for boiling water.
Bingle : motor vehicle accident
Bities : biting insects 
Bitzer : mongrel dog (bits of this and bits of that) 
Bizzo : business ("mind your own bizzo") 
Black Stump, beyond the : a long way away, the back of nowhere 
Bloke : man, guy 
Bloody : very (bloody hard yakka) 
Bloody oath! : that's certainly true 
Blow in the bag : have a breathalyser test 
Blowie : blow fly 
Bludger : lazy person, layabout, somebody who always relies on other people to do things or lend him things
Blue : fight ("he was having a blue with his wife") 
Blue, make a : make a mistake 
Bluey : pack, equipment, traffic ticket, redhead 
Bluey : blue cattle dog (named after its subtle markings) which is an excellent working dog. Everyone's favourite all-Aussie dog. 
Bluey : heavy wool or felt jacket worn by mining and construction workers.
Bluey : bluebottle jellyfish
Bodgy : of inferior quality 
Bog in : commence eating, to attack food with enthusiasm 
Bog standard : basic, unadorned, without accessories (a bog standard car, telephone etc.)
Bogan : person who takes little pride in his appearance, spends his days slacking and drinking beer
Bogged : Stuck in mud, deep sand (a vehicle). 
Bondi cigar : see "brown-eyed mullet" 
Bonzer : great, ripper 
Boogie board : a hybrid, half-sized surf board 
Boomer : a large male kangaroo 
Booze bus : police vehicle used for catching drunk drivers 
Boozer : a pub 
Bored shitless : very bored 
Bottle shop : liquor shop 
Bottle-o : liquor shop (originally a man with hessian bags going around picking up beer bottles in the 50's and 60's)
Bottler : something excellent 
Bottling, his blood's worth : he's an excellent, helpful bloke. 
Bounce : a bully 
Bourke Street, he doesn't know Christmas from : he's a bit slow in the head. (Bourke Street is a brightly lit Melbourne street) 
Bowl of rice, not my : not my cup of tea; I don't like it
Brass razoo, he hasn't got a : he's very poor 
Brekkie : breakfast 
Brick shit house, built like a : big strong bloke 
Brickie : bricklayer 
Brisvegas : Brisbane, state capital of Queensland 
Brizzie : Brisbane, state capital of Queensland 
Brown-eyed mullet : a turd in the sea (where you're swimming!) 
Brumby : a wild horse 
Buck's night : stag party, male gathering the night before the wedding 
Buckley's, Buckley's chance : no chance ("New Zealand stands Buckley's of beating Australia at football") 
Budgie smugglers : men's bathing costume
Bull bar : stout bar fixed to the front of a vehicle to protect it against hitting kangaroos (also roo bar) 
Bundy : short for Bundaberg, Queensland, and the brand of rum that's made there 
Bunyip : mythical outback creature 
Bush : the hinterland, the Outback, anywhere that isn't in town 
Bush bash : long competitive running or motorcar race through the bush
Bush oyster : nasal mucus
Bush telly : campfire 
Bushie : someone who lives in the Bush 
Bushman's hanky : Emitting nasal mucus by placing one index finger on the outside of the nose (thus blocking one nostril) and blowing.
Bushranger : highwayman, outlaw 
Butcher :  small glass of beer in South Australia - From the theory that a butcher  could take a quick break from his job, have a drink and be back at work
BYO : unlicensed restaurant where you have to Bring Your Own grog, also similar party or barbecue