The phrase "gossip mill" refers to a place or group of people where gossip or rumors are spread and circulated. It is like a factory that constantly produces and spreads gossip. Full definition
Others were far more casual about it, coming out to their friends and letting those higher up find out through the very efficient gossip mill. (canadianlawyermag.com)
Let's dish about Secret, Silicon Valley's hottest and most liberating gossip mill. (entrepreneur.com)
Along the way, Étaix satirizes the marmoreal chill of the bourgeoisie, the small - town gossip mill, and, above all, the absurd yet agonized, blundering yet callous delusions of desire. (rottentomatoes.com)