待你长发飘飘莪就咔嚓一刀
[dài nĭ zhăng fā piāo piāo é jiù kă cā yī dāo]
Waiting until your hair grows long and flows, and then I will cut it with a single snip. It humorously represents someone looking forward to completing a particular event and then ending it dramatically, which can refer to anticipation before a final farewell