Definition: Rosie is a common phrase in English, often used for a lady who is warm and friendly. It's like saying "beautifull" or "glad to help" in another context. The word has diverse meanings depending on where it's used - "rosie" might be a slang term referring to someone who has good taste or perhaps someone who's kind, while "rosie" itself refers to the British spelling for Rosie, an iconic 1920s children's book character.