当女汉子是为了跟你做兄弟
[dāng nǚ hàn zi shì wéi le gēn nĭ zuò xiōng dì]
This user name means that the user would like to be seen as 'one of the boys' by acting strong, brave and not showing vulnerabilities, which is often stereotypically expected of males but here the user calls themselves 'female'. It could also mean they don't like a romantic relationship with the addressed person but only want friendship.