back-fence talk Share definition Flag Back-fence talk (noun) is synonymous to gossip, rumour, scuttlebutt, dirty laundry, slander, defamation, hearsay, whispering campaign, malicious talk, and talebearing. My so-called friends have been spreading around back-fence talk about me. back-fence talk by GlamourAsianGuy November 8, 2015 Get the back-fence talk mug.