scared stiff 吓坏了;非常恐惧的，极度害怕的;吓得要死的，吓傻的

【例句】
When the bank robbers4 began to shoot their guns, I was scared stiff and couldn ’ t run away.
当银行劫匪开始开枪的时候，我吓得僵硬，不敢逃跑。

I was scared stiff when I realized what I'd done.
当我意识到自己的所作所为时，我吓坏了。