Australian manages its incomprehensibility through multiply overloaded ironisation. You’d call your best mate something, and you’d call a stranger you disliked mate. But someone you genuinely disliked you’d wait forty minutes until they couldn’t remember you and king hit them from behind in a location without video cameras. And you’d use both words in all three cases using inflection or ironically used anti-inflection in context.
Back in the 1930s/40s there were similar inflective rules around irony combined with a dense ridiculous set of stereotyped metaphors, rhyming slangs and the like.
the problem is anyone who could do cockney could break Australian open as they used a lot of the same examples rules and systems.