Ordinary Banana

that's pretty efficient trolling if so like I aspire to that level

Some truth... "sick cunt" is non-misinterpretable & mean's "cool person" but also means the speaker is a wanker.

how did you guys surpass the british when we are still stuck in like 1973

"sir" & "madam" are two things that I know some part of the US say, that's really uncomfortable for Australians to hear.

default reaction can be something like "who the fuck are you?" or "who does this person think they are?"

It sounds ultra-classy, like aristocratic. Not even bourgeois.

"mate" is the equivalent, but with this word, tone is everything. This is also a word uttered in hostility.

It's a bit dated. So is "no worries". My age might be "thanks ma.."/"cheers"/"all-righty"/"okie-doke"