Through The Grapevine

American Slang

Definition

Learning or spreading information via informal, unofficial channels—i.e., rumor or gossip.

Examples

"I heard through the grapevine that the manager is stepping down, but nothing’s official yet."

"She found out through the grapevine that her favorite band is playing a secret show downtown."

"Around here, news travels through the grapevine faster than any official announcement."