待我长发及腰你已变成人妖
[dài wŏ zhăng fā jí yāo nĭ yĭ biàn chéng rén yāo]
This nickname plays on a classic Chinese romantic expression that signifies the waiting for a loved one. Traditionally, it would say 'When my hair reaches my waist (symbolizing growing older or mature enough), will you marry me?' Here, it humorously twists to mean by the time the speaker's hair grows long, the addressed person has transformed from male to female.