Green’s Dictionary of Slang

Barry Crocker n.

[rhy. sl.; ult. Aus. entertainer/film actor Barry Crocker (b.1935)]

(Aus.) a shocker, something bad.

[Aus]G. Seal Lingo 90: Another recent invention is A barry crocker meaning a shocker (something bad), after the well-known entertainer and star of the Bazza McKenzie films of the 1970s, often used in its shortened form of barry.
[Aus]D. McDonald Luck in the Greater West (2008) 163: – How are you? – Had a Barry Crocker – A – what? – Shocker. A shocking day.
[Aus]N. Cummins Adventures of the Honey Badger [ebook] Barry Crocker = shocker.
[Aus]Betoota-isms 243: Ex. ‘Dusty missed about six goals on the weekend, he was havin’ an absolute Barry Crocker with the boot’.