obscenity

Short definition from Wiktionary

Noun

1. 1
   Something that is obscene.
2. 2
   An act of obscene behaviour.
3. 3
   Specifically, an offensive word; a profanity; a dirty word.
4. 4
   Lewdness, indecency, or offensive behaviour or material.
5. 5
   The fact of being obscene.