The one time I baffled my Amsterdam audience with American slang

In general, I thought my Amsterdam talk went smoothly and was well-received. But at one point, with reference to bankers who make bets that have positive expected returns for them because they don't bear the downside tail risk, I unthinkingly said something about how sometimes it comes up snake eyes. Alas, pretty much no one in the predominantly Dutch audience knew what this meant, and several asked me afterwards. But they agreed that the Americanism for rolling a pair of ones in craps is striking and apt.