babbling, blabbing, cackling, chaffering(British), chattering, chatting, chinning(slang), conversing, gabbing, gabbling, gassing, jabbering, jawing, kibitzing(also kibbitzing), nattering, palavering, prating, prattling, rapping, rattling, running on, schmoozing(or shmoozing), talking, twittering, visiting

gossiping, tattlingdescanting, discussing, expatiatingyakking(also yacking), yammering, yapping

blowing smoke, chewing the fat(also chewing the rag), shooting the breeze, talking a blue streak