Smut
Part of speech: noun
Definition: Soot. Sexually vulgar material; something that is sexual in a dirty way. A promiscuous, trashy, classless woman. Any of a range of fungi, mostly Ustilaginomycetes, that cause plant disease in grasses, including cereal crops; the disease so caused.
Vulgarism
Part of speech: noun
Definition: A word or term that is considered offensive or vulgar.A spelling, word, or phrase used in common speech that is considered improper or incorrect for formal communication.