姐狠流氓哥狠纯洁
[jiĕ hĕn liú máng gē hĕn chún jié]
The phrase literally translates to 'The girl (sister in Chinese culture term) is tough (rogue/naughty) but the boy (brother in Chinese culture term) is pure'. This is humorous and reflects the persona or self-description of being different in aspects of one's character or behavior: bold yet innocent, or rebellious yet kind-hearted.