From WordNet (r) 3.0 (2006):
prate
n 1: idle or foolish and irrelevant talk [syn: prate,
prattle, idle talk, blether, chin music]
v 1: speak (about unimportant matters) rapidly and incessantly
[syn: chatter, piffle, palaver, prate, tittle-
tattle, twaddle, clack, maunder, prattle, blab,
gibber, tattle, blabber, gabble]