待我长发及腰勒死你所爱
[dài wŏ zhăng fā jí yāo lè sĭ nĭ suŏ ài]
It's rather dramatic in meaning: 'When my hair grows long enough to reach my waist, I'll strangle your beloved one'. This implies revenge against someone's loved one, with an element of sorrow and spite mixed in.