Smuts

noun

1. Soot.
2. A flake of ash or soot.
3. Sexually vulgar material; something that is sexual in a dirty way; pornographic material.
4. Obscene language; ribaldry; obscenity.
5. Any of a range of fungi, mostly Ustilaginomycetes, that cause plant disease in grasses, including cereal crops; the disease so caused.