Macquarie Dictionary:
ockerish, adjective. ockerism, noun.
/'okuh/. Colloquial
noun
1. the archetypal uncultivated Australian worker.
2. a boorish, uncouth, chauvinistic Australian.
adjective
3. of or relating to an ocker.
4. distinctively Australian: an ocker sense of humour.
Also, okker.
[variant of Oscar, especially the character in the television series The Mavis Bramston Show (1965-1968) played by Barry Creyton, born 1939]