rattle on(v = verb.communication) jaw, yack, yack away, yap away - talk incessantly and tiresomely;
is one way to mouth, speak, talk, utter, verbalise, verbalize
Sample sentences:
Sam and Sue rattle on
VB be loquacious, talk glibly, pour forth, patter, prate, palaver, prose, chatter, prattle, clack, jabber, jaw, blather, blatter, blether, rattle, rattle on, twaddle, twattle, babble, gabble, outtalk, talk oneself out of breath, talk oneself hoarse, expatiate, gossip, din in the ears, talk at random, talk nonsense, be hoarse with talking.