noun in crayon drawing, the use of the stump.
2. scumbling ·noun the color so laid on. also used figuratively.
3. scumbling ·p.pr. & ·vb.n. of scumble.
4. scumbling ·noun a mode of obtaining a softened effect, in painting and drawing, by the application of a thin layer of opaque color to the surface of a painting, or part of the surface, which is too bright in color, or which requires harmonizing.