prattle(noun, verb) noun1. idle or foolish and irrelevant talkSimilar word(s): blether, prateDefinition categories: communication, cackle, chatter, yack, yak verb1. speak (about unimportant matters) rapidly and incessantlySimilar word(s): blab, blabber, chatter, clack, gabble, gibber, maunder, palaver, piffle, prate, tattle, twaddleDefinition categories: communication, mouth, speak, talk, utter, verbalise, verbalize