我叫大姐姐你是小包子
[wŏ jiào dà jiĕ jiĕ nĭ shì xiăo bāo zi]
The net name suggests an affectionate, perhaps humorous or teasing relationship between the nickname holder and another person, indicating she is the 'big sister' and addressing the other as 'little bun'. This is often used by young people on the Internet to indicate a friendly relationship.