expression, noun
Refers to unverified information that comes through informal channels, as if carried by the wind. Often used when the source is unclear or distant.
風の便りに彼が結婚したと聞いた。
I heard through the grapevine that he got married.
風の便りでしか知らないが、あの店はもう閉まったらしい。
I only know from hearsay, but apparently that shop has already closed.