WE LOVE THE TERM CHILLYBIN in Aus too...Good old Kiwi's, always coming up with the good ones! Lol.
I've never been to the States, but know many yanks and yes, they have their own lingo. What amazes me is the diversity of it, you know, Boston to LA, New Orleans to Boulder...So many different accents and slang. An indication of the cultural diversity of the past, and present too I guess.