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. The phrase and acronym are used in youth culture and music. The phrase and acronym were popularized by the song “The Motto” by Canadian rapper Drake. 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.