<p><strong>Noun</strong></p><ul><li>light, downy particles, as of cotton</li><li>a soft, light, downy mass: a fluff of summer clouds</li><li>something of no consequence: The book is pure fluff, but fun to read</li><li>an error or blunder, especially an actor's memory lapse in the delivery of lines</li></ul><p><strong>Verb</strong></p><ul><li>to make into fluff; shake or puff out (feathers, hair, etc.) into a fluffy mass</li><li>to fluff up the sofa pillows</li><li>to make a mistake in: The leading man fluffed his lines</li><li>to become fluffy; move, float, or settle down like fluff</li><li>to make a mistake, especially in the delivery of lines by a performer; blunder</li></ul>