dice roll

dice roll (plural dice rolls)

1. (idiomatic) Something unpredictable or unexpected.
   • 2021 July 24, Mike Hytner, “Surf’s up: a watershed moment for boarders at the Tokyo Games”, in The Guardian‎:

     But Tsurigasaki Beach is no Teahupo’o in Tahiti – one of the world’s best breaks and the completely offshore venue for the 2024 Paris Olympics – and the decision to eschew recent advances in wave technology in favour of the ocean is something of a dice roll by the organisers.

2. Used other than figuratively or idiomatically: see dice,‎ roll.