拉勾为什么要上吊
[lā gōu wéi shén me yào shàng diào]
This nickname uses a pun. '拉勾' (lā gōu) means making a pinky promise, while '上吊' (shàng diào) is literally 'hanging oneself.' It humorously combines the two, asking 'Why would a simple promise cause someone to be in such despair?'