倾国倾城肆无忌惮的笑
[qīng guó qīng chéng sì wú jì dàn de xiào]
This nickname implies someone who laughs without any reservations or restrictions ('肆无忌惮'), which is so charming as to be captivating and stunningly beautiful (倾国倾城). This phrase usually refers to people who exude a sort of natural magnetism that brightens the world around them.