No worries is an expression in English meaning "do not worry about that", "that's all right", "forget about it" or "sure thing". It is similar to the American English "no problem". It is widely used in Australian and New Zealand speech and represents a feeling of friendliness, good humour, optimism and "mateship" in Australian culture, and has been called the national motto of Australia.
The phrase has influenced a similar phrase used in the Tok Pisin language in Papua New Guinea. Its usage became more common in British English after increased usage in Australian soap operas that aired on television in the United Kingdom.
Linguistic experts are uncertain how no worries became utilized in American English; theories include use by Steve Irwin on the television program The Crocodile Hunter and usage by the United States media during the 2000 Sydney Olympics. It has also gained common usage in Canadian English.[1][2]
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