High Quality Content by WIKIPEDIA articles! No worries is an Australian English expression, meaning "do not worry about that", "that`s alright", or "sure thing". It is similar to the American English no problem. The phrase is widely used in Australian speech and represents a feeling of friendliness, good humour, optimism and "mateship" in Australian culture. The phrase has been referred to as the national motto of Australia and has influenced a similar phrase used in the Tok Pisin language in Papua New Guinea.