YOLO is an acronym for "you only live once". Similar to carpe diem or memento mori, it implies that one should enjoy life, even if that entails taking risks. 

YOLO是“你只活一次”的英文首字母缩写。和拉丁语的“及时行乐”或“死亡警告”相类似，YOLO的寓意是人应该享受人生，即使需要承担风险。

It has become a popular Twitter hashtag. Some youth have said that it is their motto, and actor Zac Efron has a tattoo with the acronym. The phrase and acronym are used in merchandise worn by teenagers such as hats and t-shirts.

YOLO已经成为一个流行的推特标签。有些年轻人称YOLO是自己的座右铭，演员扎克•埃夫隆还刺了一个该缩写的纹身。这一缩写词还被用在青少年穿戴的帽子、T恤等商品上。