Competitiveness between New Zealanders and Australians goes beyond sports rivalries: There is a certain mutual chippiness. The Kiwis are sensitive to being the junior country, in terms of land mass, population, and economic development. The Aussies are sensitive to slights about convict-era antecedents.
One thing people Down Under have in common is the use of the expression, "No worries." "No worries" is a response employed by people of all ages and social classes under the roughly the same circumstances that prompt the use of the response, "No problem," by many young people in the United States.
