七夕跟我一起唱分手快乐
[qī xī gēn wŏ yī qĭ chàng fēn shŏu kuài lè]
On Qixi (the Chinese Valentine’s Day), 'Sing Happy Break-Up with Me' -- which is likely to reflect on some sort of irony. One might use this nickname due to a bittersweet memory, perhaps having undergone a breakup while still wanting or trying to appear positive.