all bets are off
一切皆無法預測，沒有確定性或保證
口語·表示情況突變無法預測
英文釋義
to imply that previously established rules or expectations no longer apply
例句
With the sudden change in weather, all bets are off for the outdoor concert tonight.
典故來源
源于賽馬或賭博，當出現(xiàn)意外情況時，所有賭注取消或規(guī)則失效。