prattle away (about someone or something)

prattle away (about someone or something)

To ramble, chatter, or babble (about someone or something) in an idle, meaningless, or incessant way. What on earth is he prattling away about now? Jeff's been prattling away about some girl he met at camp over the summer. The date was pretty boring. She just prattled away the whole evening, and I couldn't get a word in edgewise.
See also: away, prattle, someone