笑死人不偿命
[xiào sĭ rén bù cháng mìng]
'Dying of Laughter Without Reimbursement'. It's an expression similar to English “LOL”. By taking such a playful username, it can make people guess that he or she might be cheerful, fond of humor, sarcasm, entertainment, and willing to laugh at the nonsenses around him or herself or to bring joy into everyone’s lives.