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C

Cack: Something unpleasant.
Cacky-hander: Left-handed person.
Cactus: Dead, not functioning. ("This bloody washing machine is cactus.")
Cark: When you die, you "cark it."
Capt. Cook: Look (noun). ("Let's have a Capt. Cook.")
Chewie: Chewing gum.
Chinwag: Conversation.
Choof off: To leave.
Chook: A chicken.
Chuck a sickie: Take the day off sick from work when you're perfectly healthy.
Chunder: To vomit.
Clayton's: Fake, substitute.
Click: Kilometer. ("It's 10 clicks away.")
Clucky: Feeling broody or maternal.
Cobber: A friend or mate.
Codswallop: Nonsense.
Coldie: Can of beer.
Come a gutser: Make a bad mistake, have an accident.
Comic cuts: Your guts.
Cooee, not within: Figuratively a long way away, far off. ("England wasn't within cooee of beating Australia at cricket.")
Corker: If something's great, it's a corker.
Cozzie: Swimming costume.
Crack on to: To woo a member of the opposite sex.
Crash hot: Can mean something great. You can also be feeling "not so crash hot" (buggered).
Crawler: Sycophant.
Crikey/Cripes: Expression of surprise.
Crook: When you're feeling ill, you're "crook."
Crows: "Stone the crows." Expression of disbelief or surprise, similar to crikey, cripes.
Cut snake, mad as a: Very angry.

D

Dag: A funny person, nerd, goof.
Daks: Trousers.
Damper: Bread made from flour and water.
Dead dingo's donger, as dry as a: Very dry.
Deadset: True, the truth.
Decko: To take a decko means to look.
Digger: A soldier.
Dill: An idiot.
Dingo's breakfast: A yawn, a leak and a good look around (i.e., no breakfast).
Dinkum, fair dinkum: True, real, genuine. ("I'm a dinkum Aussie," or "Is he fair dinkum?")
Dinky-di: The real thing, genuine.
Dob (somebody) in: Inform on somebody. Hence dobber, a tell-tale.
Docket: A bill, receipt.
Doco: Documentary.
Dog's eye: Meat pie (Australian national dish).
Dole bludger: Somebody on social assistance when unjustified.
Doozey: Something very pleasant, significant, large.
Dot: Your bottom.
Drink with the flies: Drink alone.
Drongo: A dope, stupid person.
Drop your bundle: Lose control.
Drum: Information, tip-off. ("I'll give you the drum.")
Duchess: Sideboard.
Duck-shove: Continually moving a problem until it disappears.
Dummy, spit the: Get very upset at something.
Dunny: Outside lavatory.
Dunny budgie: Blow fly.
Dunny rat, cunning as a: Very cunning.
Durry: Cigarette.
Dyke: Toilet.