I have better things to do than listen to this blather.

I'd rather get a root canal than listen to this blather.

I'm fed up with Tom's incessant blathering.

Tom blathered on about God and the Bible.

I hope Tom isn't going to blather on for much longer; I'm hungry.

I hope they're not going to blather on for too long.

Tom blathered on and on.

Enough blather; get to the point.