待我长发及腰勒不死你小三
[dài wŏ zhăng fā jí yāo lè bù sĭ nĭ xiăo sān]
This username appears to come from a dramatic statement in Chinese literature, implying waiting until the user's hair grows long enough before confronting a third party (usually interpreted as a mistress) who interferes with the user’s romantic relationship.