babble, blab, cackle, chaffer(British), chat, chatter, chin(slang), converse, gab, gabble, gas, jabber, jaw, kibitz(also kibbitz), natter, palaver, patter, prate, prattle, rap, rattle, run on, schmooze(or shmooze), talk, twitter, visit

gossip, tattledescant, discuss, expatiateyak(also yack), yammer, yap

blow smoke, chew the fat(also chew the rag), shoot the breeze