WordWeb Online

1. Gossip spread by spoken communication
   "the news of their affair was spread by word of mouth";
   - grapevine, pipeline

1. Expressed orally
   "the film had good word-of-mouth publicity";
   - viva-voce

See also: spoken

Type of: comment, goss [Brit, informal], gossip, scuttlebutt [N. Amer, informal]

Encyclopedia: Word of mouth