Risky or uncertain; unpredictable because the outcome depends partly on luck or chance.
From 'dice,' the gambling tools. Metaphorically, if something is 'dicey,' its outcome is as uncertain as a roll of the dice, similar to modern 'iffy' or 'chancy.'
The word 'dicey' comes from the fact that dice games are pure chance—so calling a situation 'dicey' means you're treating real life like a gambling game where luck matters more than control.
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