ramble on(If you say that someone is rambling on, you mean that they have been talking for a long time in a boring and rather confused way. • She only half-listened as Ella rambled onAndrey Truhachev); run one's mouth(Niko: Ray runs his mouth so much that no one pays much attention to what comes out of it.4uzhoj); flap one's lips(Taras); talk smack(to chatter Taras); natter