A sexual act in which a male stands up with his pants off and his partner (female or male) takes their hands and "fluffs" his balls by quickly moving them through their fingers and lifting them up and down.
(Boy takes his pants off)
Boy: "Babe can you come over here? I need you to fluff my pillow!"
Girl: "Sure i would love to come fluff your pillow"
gay slang, pre-Stonewall era, meant as a put-down. Meaning there's too much powder make-up on your powder puff, Mary; you need to tone it down. You need to calm down.