He skummed the milk before setting it aside to make cheese.

The old kettle began skumming, spewing tiny bubbles over the rim.

After the long voyage, the ship's bilge was covered in a gray skum that told of the salt and soot it had gathered.

Please skum the broth before serving so the soup remains clear.

After the storm, the river skums, leaving a layer of foam and debris along the banks.