Don bradman reference - he is extremely famous because Cricket is the national sport - "widely acknowledged as the greatest batsman of all time." A lot of aussies would agree that should be on the citizenship test to be an "aussie". As sport is such a big part of what it means to be aussie. Even for women - women's sport is even getting quite popular now from what I know - with women like Dawn Fraser being very famous.
The kookaburra song is an aussie classic. Gay means happy originally.
Indians are like Germans and w/v are switched. Vater, not Water, in both India and Germany - English being a mixture of German, French and Latin so taking only some of the Germanic sounds for the alphabet.
We do generally bury dead pets in the backyard.
VB is the most popular Australian beer - in terms of being the "classic Aussie beer". Drunk mostly by men due to being considered a strong full strength beer in flavour.
Mozzies are worse in some places than others. In some states their arn't many but there are in NSW due to the higher amounts of inland water in the Murray-Darling basin region (Sydney, etc). There are lots of techniques to keep them off food and etc.
Countries by annual leave (holidays - yes we have a queens birthday holiday and britain doesnt). January is summer holidays - from just before xmas which you spend with family then bugger off. Similar to in europe everyone buggers off in August.
Sickie culture. Too hot... people go to the beach. Depends on your job.
Cricket is watched a lot in Australia during the holidays as it plays on the public holidays over xmas - "official audience data shows that 93.6% of Australians watched at least some cricket on TV in 2010–11 calendar year".
Why the lamb bit is funny is because we are majorly a beef eating country, and there is famous domestic ads, which originally looked like a government message, trying to convince people to eat more Lamb (still today).
There is a lot of native animals killed by cars, and we don't eat enough kangaroo. The government kills 1 million of them per year because they are like deer and we killed all their predator animals. So we should eat more of them but Australians are generally uncomfortable about it. So it's a joke about it.
You do win meat trays (along with usually other things, but the meat tray is well liked because meat is expensive) at Bingo at RSL clubs (british TV show talking about RSL clubs - it's of course also a large restaurant, pub and some of them become nightclubs on the weekend - all combined).
Sheila is a generalised term for "woman" - so the joke is that she is "every woman's house".
A coon is also a slang derogatory term for an aboriginal. But also a brand of cheese. In recent years they have changed their name to be culturally appropriate because of it even though a lot of young aussies wouldn't get the association anymore.
Building your own bbq is sometimes common - but as Australia has become more rich I think it's less common now. As a kid my parents handbuilt a fancy bbq in the backyard. I think this joke may be similar to these days how you make a bong. Ie, you use "whatever you can get your hands on" if you are desperate to use one.
Lamington is a national sweet, like pavlova, in this is a play-on-words with lamb.
The start is literally how we talk to our friends.
I laughed so hard when I realised that the boomerang was what he was using on the barbie that I think I woke people up in my house in the middle of the night. Did not expect it at all.
The way they look, is 100% how aussies looked in the 80s-90s. With the mullet and moustaches.
Skippy is the most famous Australian kangaroo. It was a children's tv show that was popular around the world in the 60s.
Quite a few aussies are racist, depending on a few things. As they explain, with the White Australia Policy which that generation is still alive that lived through that policy being in place.
Sheep shagger is what we call Kiwis (New Zealanders). I've used nearly all of them, except Jimmy Grant (probably not acceptable anymore), and I got mad when she said asswipe wrong (thats how much we care about our slang, lol).
Joey is the title for all baby marsupials. Like foal for baby horses, or piglet for baby pigs.
"... Sigmund Freud, in his 1927 essay Humour (Der Humor), puts forth the following theory of black comedy: "The ego refuses to be distressed by the provocations of reality, to let itself be compelled to suffer. It insists that it cannot be affected by the traumas of the external world; it shows, in fact, that such traumas are no more than occasions for it to gain pleasure."