be skating on thin ice 冒风险；如履薄冰

【例句】
I hope you realize that you'll be skating on thin ice if you decide to gamble your employees' retirement funds on such a dodgy investment.
我希望你意识到，如果你决定把员工的退休基金押在这样一项不可靠的投资上，那你将如履薄冰。

Mike doesn't know that he is skating on thin ice.
迈克没有意识到自己正处于风险之中。