This article is from the soc.culture.australian FAQ, by Stephen Wales with numerous contributions by others.
[PG] Well, being the literary expert that I am . . . 8-) I'll have a
crack at it. Reference page 182 "A Nice Night's Entertainment" Barry
Humphries published 1981 by Granada:
"Anyway, there she was starkers! I didn't know where to look. The
driver seen her norks in the rear-vision mirror and nearly come off
his dual carriageway. He said, 'Ay, miss, 'ow are you goin' to pay
me?", at which she pointed ... Now, there's a nice crowd in here
tonight so I'm not going to tell you where she pointed; suffice it to
say she pointed at the map of Tasmania. Those of you with a
rudimentary grasp of geography will have a rough idea of what I nearly
had a rudimentary grasp of - a large triangular land mass deep in the
southern hemisphere." Quiz question: which BH character said this?
8-)
[JMack] I first heard the expression in conjunction with the arrival
of the show "Hair" in Sydney (this was about 1970). I don't remember
whether it was a friend, or a review in the paper or a quote from
Robert Helpman, but the person referring to the costumes on the stage,
mentioned the maps of Tasmania. It's not quite as graphic as Barry
Humphries use above, but it predates it.
 
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