plout

And while we lay in the frozen cold of the pool, the water tinkled and gurgled and laughed, and went plout-plout at my knees, as though it was a hot summer day and we were stooping to drink.

The McBrides A Romance of Arran John Sillars

Years ago, when I was a lad, she had on a summer been sewing with a kinswoman in Car-lunnan, the mill croft beside a linn of the river, where the salmon plout in a most wonderful profusion, and I had gone at morning to the hill to watch her pass up and down in the garden of the mill, or feed the pigeons at the round doo-cot, content (or wellnigh content) to see her and fancy the wind in her tresses, the song at her lip.

John Splendid The Tale of a Poor Gentleman, and the Little Wars of Lorn Neil Munro