yabba ∼ yabber
to talk too much
Stop yabbering will ya?
 from the aboriginal language woiwurrung of central vic
Stephen Harold Gascoine (1878-1942) was a rabbito who gained fame as Australia's most celebrated cricket barracker. Nicknamed Yabba, his verbal assaults were legendary at the Sydney Cricket Ground.
aussie slang since the 1840s
yabby ∼ cherax destructor
a freshwater crayfish
Native to central and eastern mainland Australia, and have been introduced into WA and Tas.
 Yabbies are also known throughout the country as crayfish or simply cray, not to be confused with lobsters or rock lobsters which are marine creatures.
The confusion arises from the fact that rock lobsters are called crayfish in Tas, SA, and NSW.
Known colloquially by various regionalisms australia-wide as lobsters which is shortened to lobby  in Qld, crawbob  in NSW & Qld, crawchie  in coastal Qld & north-east NSW, craybob  in south Qld & NSW, and craydab  in NSW & the ACT. The terms blackie , bluey , and greenie  refer to different stages of development. In WA – where cherax destructor is a recent import – there are other native freshwater crayfish. The gilgie, pronounced with an initial soft g and also spelt jilgie, (colloquialised as joogie), the koonac, and the marron.
To the neophyte they are often confused with the yabby and thus their names are used interchangeably.
 from the aboriginal language wembawemba of central vic
fishing for yabbies
Generally done with a piece of meat attached to a line – you wait until the yabby has its nipper on the meat and then you fling it out onto the land.
the xanthorrhoea or grass tree
 A reference to its yellow resin, Xanthorrhoea literally means ‘yellow flow’ in Ancient Greek.
Common names include grasstree, grass gum-tree (for its resin-yielding species), kangaroo tail and blackboy, based on the purported similarity in appearance of the trunked species to a man holding an upright spear.
In the South West, the Noongar name balga is used.
 aboriginal language kaurna from s.a.
talk about nothing very important  
a hoon or a reckless person  
hard work , especially manual labour
That was hard yakka, mate.
Common usage is the collocation hard yakka , or in the phrase all yack and no yakka , describing someone who talks about what they're going to do instead of doing it.
 aboriginal language yagara from the brisbane region aussie slang since the 1880s
yank my chain
to mislead
Are you fair dinkum, or are you just yankin' my chain?
All he does all day is sit around and smoke yarndi
See choof for a related term.
 aboriginal language wiradjuri from nsw
1 a yardman, a general hand in a hotel
2 a general dogsbody in a car yard
1 a talk or chat
We had a yarn about old times. This meaning of yarn as a noun is peculiar to Oz and NZ.
2 a story or tale
Especially a long one about extraordinary events.
Hence, to tell stories or tales.
yeah - nah
a non-committal expression
 Linguistics experts say it is a form of ‘verbal cuddling’ – agreeing to disagree with you, but in a nice way.

According to The Age, it's a sort of
maybe, but probably not.
Hey, you wanna go fishing later? Yeah-nah, my wife wants me home.
aussie slang
a wind instrument
The instrument was originally used only in Arnhem Land, but became commonly known in Australia as the didgeridoo. The Yolgnu word for the instrument has become widely known in recent decades, and was popularised by the music group Yothu Yindi, formed in 1986, whose members were Yolgnu speakers.
 aboriginal language yolgnu from arnhem land, nt
a small tree of eastern australian rainforests
 Grevillea Hilliana, also known as the White Silky Oak, produces long branched clusters of white to pale green flowers from May to October.
The wood is used in cabinetwork.
a brawl or argument
1 a hooligan or lout
2 an unrefined or uncultured person
a ewe
No longer used except in the lyrics to the song Click Go The Shears.

The ringer looks around and he's beaten by a blow
And he curses the old snagger with the bare-bellied yoe.

What this means is that the fastest shearer – the ringer – was beaten by the slowest shearer – the snagger, whose ewe – yoe or joe – has already lost its belly wool, and so is quicker to shear.
colonial slang
a small stone suitable for throwing
There are a number of similar words from all over the country for this same item, all of which come from Aboriginal languages. In Vic they have the brinnie , Qld has the gonnie , SA has the ronnie , all along the east coast there is the connie , whilst in WA they have the coondie  and the boondie , which also means a large rock, or a sand bomb used by kids. Australia-wide there is the goolie , and the gibber, the only one for which a definite origin is known.
 aboriginal australian language
you beaut!
excellent, wonderful
aussie slang
1 the plural of you
Borrowed from Irish Gaelic, which has a separate plural for the second‑person pronoun.
Youse guys ought to take a look at this.
aussie slang since the 1890s 2 the singular form of you
I ain't afraid of youse.
aussie slang since the 1910s
a mythical beast, an unidentified australian hominid
One of several names for an Australian folklore entity reputed to live in the Outback. From the aboriginal language Yuwaalarraay, up Lightning Ridge NSW way.
One story about the name, a variant of yahoo, suggests that the creature is a part of the Dreamtime.
Old Bungaree, a Gunedah Elder, said at one time:

 There were tribes of them, and they were the original inhabitants of the country, they were the old race of blacks ...
The yahoos and the blacks used to fight and the blacks always beat them, but the yahoo always made away from the blacks being a faster runner mostly.

Akin to the sasquatch or yeti, and not to be confused with the bunyip.
 aboriginal australian language
disgusting, unpleasant, repulsive
schoolkids diminutive
1 having a very nice taste
2 beautiful, gorgeous
schoolkids diminutive
it's the

Illustrated Dictionary of Australian English