Fluff up the pillows.
Every day she saw the goose fluff up her nest, turn the eggs, then settle back down to wait patiently.
For instance, the way a cat's coat will fluff up when they are scared or frightened, making them look bigger to another animal.
Binders and fillers fluff up traditional cosmetics and add yet another barrier between natural pigments and the skin.
For example, did you know you can add a cap full of vinegar to the rinse cycle in your washing machine to fluff up your wool sweaters?