[duò yún wù zhōng]   

堕    云    雾    中    堕：落下。落入迷茫的云雾中间。比喻迷惑不解。

成语解释：堕：落下。落入迷茫的云雾中间。比喻迷惑不解。 出处南朝·宋·刘义庆《世说新语·赏誉》：“王仲祖刘真长造殷中军谈，谈竟俱载去，刘谓王曰：‘卿故堕其云雾中。’”

Be completely at a loss as in a fog

堕甑不顾    堕云雾中    堕溷飘茵