Englishyak (also yack)
verb
she was yakking about her passion for antiques:
prattle, blather, blether, blither, babble (on), gabble, prate, drivel, rattle on/away, ramble, maunder, go on, run on, talk at length, talk incessantly, talk a lot, chatter, yap, gossip;
British talk nineteen to the dozen;
Scottish, & Irish slabber on;
informal jabber, blabber, yatter, jaw, gab, gas, chitchat, yackety-yak;
British, informal rabbit, witter, waffle, natter, chunter, talk the hind legs off a donkey;
North American, informal run off at the mouth;
Australian, New Zealand, informal mag;
archaic twaddle, twattle, claver, clack.