English

Noun

jungle telegraph ‎(plural jungle telegraphs)

1. (idiomatic) A system used by primitive cultures in remote tropical regions for communication over long distances, such as drum sounds or a relay of runners.
   • 1958, "Live Virus in the Jungle," Times, 11 Aug.:

     Working both sides of the stream, they got native chieftains to pass the word by jungle telegraph.

2. (idiomatic) A gossip network; an informal communication system within a group or organization.
   • 2008, Lisa Marsh "‘Hills’ Under Tents," New York Post, 5 Feb. (retrieved 19 Sep. 2008):

     And the jungle telegraph at Bryant Park is alive with rumors that the show's biggest name, Lauren Conrad, will be here any day.

Synonyms

• (communication system used by primitive cultures): bush telegraph
• (gossip): bush telegraph, grapevine, rumor mill/rumour mill