N-SING
小道消息;传闻
If you hear or learn something on the grapevine, you hear it or learn it in casual conversation with other people.
例句
He'd doubtless heard rumours on the grapevine...
他无疑是听到了小道消息。
I had heard through the grapevine that he was quite critical of what we were doing.
我听到有传言说他对我们在做的工作非常不满。