Fluff out - Idioms by The Free Dictionary
To cause something to become puffier in appearance. A noun or pronoun can be used between "fluff" and "out." In the 80s, girls used to fluff out their bangs and make their hair as voluminous as possible.
fluff something out
[for a bird] to move its feathers outward. The parrot said good night, fluffed its feathers out, and went to sleep. The bird fluffed out its feathers.
References in classic literature
To fluff out
her curls, put on fashionable dresses, and sing romantic songs to fascinate her husband would have seemed as strange as to adorn herself to attract herself.
The Local Interstellar Cloud isn't the only cloud of fluff out
there, and now Opher theorizes that other interstellar cloud formations may be highly magnetized too.