fluff
noun
light, downy particles, as of cotton.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Karen Purcell with Cornell’s Project PigeonWatch suggested the fat pigeon I saw might have been fluffing out its feathers because it was chilly.
From Slate ● Apr. 18, 2012