No worries is an Australian English expression, meaning "do not worry about that",[1] or "that's all right".[2] It can also mean "sure thing"[3] and "you're welcome".[4] Other colloquial Australian terms which mean the same thing include "she'll be right".[5] The expression has been compared to the American English equivalent "no problem".[6] In their book Australian Language & Culture: No Worries!, authors Vanessa Battersby, Paul Smitz and Barry Blake note: "No worries is a popular Australian response akin to 'no problems', 'that's OK' or 'sure thing'."[7]