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English definition of “Russian roulette”

Russian roulette

noun [U] uk   us  
a very dangerous game of chance where each player aims at their own head with a gun that has one bullet in it and five empty chambers (= spaces where bullets could go): figurative Doctors' refusal to take the issue seriously is playing Russian roulette with (= taking unnecessary risks with) ordinary citizens' health.Gambling and bookmakingTaking risks
(Definition of Russian roulette from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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