as old as Adam 很久以前；极古老的；陈旧的

【例句】
That joke you told us is as old as Adam, but I still think it's funny.
你给我们讲的那个笑话简直老掉了牙，不过我认为还是很有趣的。

His news is as old as adam.
他的新闻已经老掉牙了。