Nouns

(n)prate, prattle, idle talk, blether, chin musicidle or foolish and irrelevant talk

Verbs

(v)chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, blabber, gabblespeak (about unimportant matters) rapidly and incessantly