I've just got it through the grapevine.

我只是道听途说，只是小道消息。

　　固定表达through the grapevine，直意是“顺着葡萄藤来的”，在口语中，经常用来表示那些获得那些还没有经过官方发布的、小道消息，只是人与人之间口口相传的流言蜚语。英文的解释是，“The informal transmission of information, gossip, or rumor from person to person.”。
　　例句：
　　I don't always believe what I get through the grapevine, but it's true at least half the time and it's a lot faster than whatever the government tells you about what we're doing.
　　我不完全相信小道消息。但是，小道消息至少有一半是确实的，而且比政府告诉我们的要快多了.