This Aussie Words list only explains Aussie terms as they are used in the Aussie Guards stories.  There are lists at the back of each print book (and in XRay for each Kindle eBook) which include more obvious terms, like hubbie meaning husband. There are more details again in the Sheila Strine discord for NSFW explanations. That discord is only open to Sheila Strine Patreon members.

For readers interested in Aussie words in general, there are far longer lists of Aussie terms. For example, the Australian National University, School of Literature, Languages and Linguistics has a list with explanations at https://slll.cass.anu.edu.au/centres/andc/meanings-origins/all and a lot of travel consultants have put together lists of Aussie phrases, some of which are hilarious.

For those interested in South Australia specifically, there are generally held to be four South Australian dialects, and analysis of the Adelaide one may be found in The Global Council for Anthropological Linguistics: The Adelaide dialect in Australia language at https://glocal.soas.ac.uk/adelaide-dialect-in-australia/.  As an Adelaidean, I was surprised by some of their conclusions, which just goes to show how individuals can have different language sets even in the same city.