fluff

noun

• 1 [mass noun] soft fibres from fabrics such as wool or cotton which accumulate in small light clumps:he brushed his sleeve to remove the fluff
• any soft downy substance, especially the fur or feathers of a young mammal or bird.

• 2entertainment or writing perceived as trivial or superficial:the film is a piece of typical Hollywood fluff

• 3 informal a mistake made in speaking or playing music, or by an actor in delivering their lines.

verb

• 1make (something) appear fuller and softer by shaking or brushing it:I fluffed up the pillows

• 2 informal fail to perform or accomplish (something) successfully or well:the extra fluffed his only line