soft fibres from fabrics such as wool or cotton which accumulate in small light clumps

he brushed his sleeve to remove the fluff

entertainment or writing perceived as trivial or superficial

the film is a piece of typical Hollywood fluff

a mistake made in speaking or playing music, or by an actor in delivering their lines

make (something) appear fuller and softer by shaking or brushing it

I fluffed up the pillows

fail to perform or accomplish (something) successfully or well

the extra fluffed his only line