Russian roulette
noun
mass noun
1- the practice of loading a bullet into one chamber of a revolver, spinning the cylinder, and then pulling the trigger while pointing the gun at one's own head俄式轮盘赌（赌时将一发子弹装入左轮手枪的弹膛, 转动旋转弹膛, 然后举枪对准自己的头并扣动扳机）。
1.1
- figurative an activity that is potentially very dangerous〈喻〉玩命游戏。