出自《史记·刺客列传》，好像旁边没有人。形容说话或做事非常坦然，或者高傲、自大。若：好像。
From the Records of the Historian’s biography of assassins, meaning to act completely uninhibited, as if others aren’t present, whether brazenly nonchalant or arrogantly oblivious.
战国时期，卫国荆轲前往各诸侯国游说，劝说他们联合起来共同对抗强大的秦国。他到赵国游说，却遭到赵王轻蔑的对待，失望之余，他便前往燕国碰碰运气。
During the Warring States period, Jing Ke traveled between feudal states advocating they unite against the powerful Qin. When he lobbied the King of Zhao, he was treated with disdain. Disappointed, he headed next to Yan to try his luck.
到燕国后，荆轲结识了一个叫高渐离的人。高渐离是个乐师，却终日以卖狗肉为生。荆轲与高渐离志趣相投，他们经常在一起喝酒唱歌，谈论人生理想。有一天，他们两人在闹市中喝酒，喝得差不多了，他们就趁着酒兴唱起歌来。高渐离演奏，荆轲和着音乐高唱，他们时而狂笑，时而抱在一起痛哭，好像这个世界上只有他们二人，旁人根本不存在似的。
In Yan, Jing Ke befriended a musician named Gao Jianli who made a living selling dog meat. The two hit it off, often drinking wine together while discussing philosophy and ideals. One day, they were drinking publicly and, quite inebriated, began singing loudly. Gao played music while Jing Ke sang boisterously, laughing wildly at times, embracing sorrowfully the next – as if the two of them were the only ones in existence, utterly oblivious to everyone around them.
后来荆轲帮助燕子丹去刺杀秦王，结果失败被杀了。
Later, Jing Ke assisted the Yan prince Dan in an unsuccessful assassination attempt on the Qin king, leading to Jing’s execution.