as deaf as a post 〈非正〉全聋；聋得什么也听不见

【例句】
It is of no use to talk to him; he is as deaf as a post.
跟他说话毫无用处，因为他一点也听见。

I had to shout at the old man before he heard me; he must be as deaf as a post.
我必须对那老人大声喊叫他才能听见，他一定聋得很厉害。