A
bizzare expression used by some people to describe the small, square cushions placed on a couch to enhance it's comfort and
aesthetics, as opposed to the larger cushions which form the seat and are hence
integral to the couch.
They're not "couch pillows", they're CUSHIONS. Pillows are what you rest your head on while you sleep, cry into when you're a teenage girl or bite when you get fucked in the ass - but only when the aforementioned events happen IN BED.