When we heard on the grapevine that one of our four-legged friends was setting up her own fan club, it certainly gave us paws for thought. (BNC)
Hearing on the grapevine that Island Records' in-house Fallout Shelter studios were in need of a trainee engineer, he pestered them for an interview that afternoon and began work the next day. (BNC)
I heard on the grapevine that she was pregnant, but I don't know anything more. (Google)