rattle away

rattle away

To speak tediously and at great length (about something). He just kept rattling away about literary metaphors and imagery. I didn't know what he was talking about! I caught myself starting to fall asleep while the professor rattled away.
See also: away, rattle
Farlex Dictionary of Idioms.

rattle away

to chatter endlessly and aimlessly. The two old men sat there and rattled away at one another. Tom rattled away at Jane for a few minutes and then left the house.
See also: away, rattle
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • rattle on
  • ramble on
  • keep (going) on about (something)
  • be on about
  • be on about (something)
  • be on about something
  • be/go/keep on about something
  • explain
  • at great length
  • length