smut

中文： 色情作品、下流话、煤烟

1. Soot. (uncountable)
2. A flake of ash or soot. (countable)
3. Sexually vulgar material; something that is sexual in a dirty way; pornographic material. (uncountable)
4. Obscene language; ribaldry; obscenity. (uncountable)
5. Any of a range of fungi, mostly Ustilaginomycetes, that cause plant disease in grasses, including cereal crops; the disease so caused. (countable, uncountable)
6. Bad, soft coal containing earthy matter, found in the immediate locality of faults. (countable, uncountable)

复数 smuts