here's what 'Strine Decoded has to say:
(http://www.artistwd.com/joyzine/australia/strine/b.htm)

bluey - 1. summons issued by police. 2. cattle-dog; kelpie. 3. nick-name for a friend, mate, red-haired person. 4. a ten-dollar note.

Grueße an euch alle!