待我长发及腰你已娶了她人
[dài wŏ zhăng fā jí yāo nĭ yĭ qŭ le tā rén]
It means, wait until I grow my hair long enough to reach the waist, only to find that you are already married to another woman. This suggests the bitterness and despair felt when waiting and expecting for something or someone in vain.