n. Light down or fuzz, as on a young bird or on a dandelion or milkweed seed.n. Something having a very light, soft, or frothy consistency or appearance: a fluff of meringue; a fluff of cloud. n. Something of little substance or consequence, especially:n. Light or superficial entertainment: The movie was just another bit of fluff from Hollywood. n. Inflated or padded material: The report was mostly fluff, with little new information. n. The parts of a junked car that are not metal and cannot be recycled.n. Informal An error, especially in the delivery of lines, as by an actor or announcer.v. To make fluffy: fluff a pillow; a squirrel fluffing out its tail. v. Informal To ruin or mar by a mistake or blunder: They fluffed their chance to participate in the playoffs by losing their last three games. v. Informal To forget or botch (one's lines).verb-intransitive. To become fluffy.verb-intransitive. Informal To make an error, especially to forget or botch one's lines.