ˌRussian rouˈlette noun [uncountable]
a game in which you risk killing yourself by shooting at your head with a gun that has six spaces for bullets but only one bullet in it

[TahlilGaran] Dictionary of Contemporary English ▲

Russian roulette
1. a game of chance in which one bullet is placed in a revolver and the cartridge is spun and the player aims the gun at his head and pulls the trigger
The men in the movie played Russian roulette until one of them finally died.

2. a potentially dangerous situation
Putting the dangerous chemicals on the old ship was like playing a game of Russian roulette.

[TahlilGaran] English Idioms Dictionary ▲

russian roulette
n. A game of chance in which one bullet is placed in a revolver, the cartridge cylinder is spun, and the player aims the gun at his own head and pulls the trigger.
Only a fool would risk playing Russian roulette.

[TahlilGaran] English Idioms Dictionary ▲