The Australian diet is a protein (but not high protein) diet, developed by personal trainer James Duigan , famous for being the coach of Elle McPherson, a model who in the 1990s was nicknamed “The Body”.

This diet is also known as CUT THE CRAP .

Crap is a word that in English means crap, but here is the double meaning of Crap as crap and Crap as an acronym for COFFE / REFINED CARBS / ALCOHOL / PROCESSED FOODS.
That is, coffee, refined carbohydrates, alcohol, industrial foods.
Which are the foods to avoid. 

THE AUSTRALIAN DIET

With the Australian diet for 2 weeks you have to say goodbye to coffee (ok up to two cups), refined carbohydrates, alcohol and industrially processed foods. Duigan relies heavily on so-called good fats, so encourages the use of olive oil, raw butter, coconut oil (both cooked and raw), olives, salmon, nuts, oil seeds.

By doing this diet for two weeks you will lose up to 5 kilos.
Then there is a maintenance phase in order not to regain weight.