From an Aussie point of view, 'Kiss my arse' is widely used over here as a reply to anything that doesn't deserve a dignified response. Also is has been twisted into 'suck a fart' or 'tounge me (my)pucker'....instead of saying 'kiss my arse you idiot', one might say, 'go suck a fart ya wanker' or 'tounge me pucker ya fucker'

other words you may wish to discuss the origins of are;

Nong - a simple person
Bludger - lazy person, layabout
Bodgy - of inferior quality
Brown-eyed mullet - a turd in the sea (where you're swimming)
Chunder - vomit
Cark it - to die, cease functioning
Clacker - pucker, date, cackpipe, poochute or bumhole
Goopsock - comdom

Now I've given you all the shits......I'll rack off.

PS. Great dynamic you got there.
Raven