- Moist, slippery matter - Muck - Soft, moist earth or clay, having an adhesive quality;
viscous mud. - Any mucilaginous substance; any substance of a dirty nature,
that is moist, soft, and adhesive. - Bitumen. - Mud containing metallic ore, obtained in the preparatory
dressing. - A mucuslike substance which exudes from the bodies of
certain animals.