There was once a man

There was once a man who was looking to create a new idiom.

He was having trouble thinking of one, so he decided to look around there. He didn’t find anything.

So he got into his car, drove to town, and looked around there for inspiration.
As you can probably guess, he had no luck.

The man eventually gave up and went to see a friend on their farm. He was driving as he passed down a rustic looking well.
He pulled over and rushed to closer inspect the well.
It was located near the ocean, it had a handle to pull up the bucket that had a weight on the other side, and it looked very old.
The man was suddenly struck with inspiration. He ran home and told other people. His idiom?

Well, Weight and Sea. I’ll tell you in a bit