在她的葬礼上唱倍爽儿
[zài tā de zàng lĭ shàng chàng bèi shuăng ér]
'Singing in delight on her funeral'. While this appears rather inappropriate by most ethical or social standards, it seems that this user chose it as an unusual, exaggerated username, which may reflect the person's rebellious, unique personality, or just for attracting attention, or perhaps even expressing schadenfreude.