For me it's a scrap if I won't be using the fabric in a planned project. If the fabric, say a generic color/design, is appropriate for binding, that 1/8 of a yard (4 1/2" wof) would make 2 strips of binding for a small wall hanging or table runner; then it's not a scrap. At the same time a fat quarter could be a scrap if it's an odd design or color that doesn't go with any planned project.
Like Tartan, I looked in my scrap bin for face masks, too.
Good luck with your sorting...