{i} sooty particle; black spot, smudge; obscenity; pornography; plant disease characterized by the development of black powdery spots on the affected part; fungus which causes smut
any fungus of the order Ustilaginales destructive diseases of plants (especially cereal grasses) caused by fungi that produce black powdery masses of spores affect with smut or mildew, as of a crop such as corn become affected with smut; "the corn smutted and could not be eaten"
Smut or smuts is dirt such as soot which makes a dirty mark on something. Disease of cereals, corn, grasses, onion, and sorghum, caused by many species of fungi (see fungus). Spores accumulate in sootlike masses (sori) that form within blisters in seeds, leaves, stems, flower parts, and bulbs. The sori usually break up into a black powder that is readily dispersed by wind. Many smut fungi enter embryos or seedling plants, develop throughout the plant, and appear externally only as the plants near maturity. Other smuts are localized, infecting actively growing tissues. Control includes growing resistant varieties in noninfested soil, treating seeds with fungicide, using disease-free transplants, and destroying infected plants or plant parts before the spores are released
disapproval If you refer to words or pictures that are related to sex as smut, you disapprove of them because you think they are rude and unpleasant and have been said or published just to shock or excite people. schoolboy smut