noun (n)

• any substance considered disgustingly foul or unpleasant(noun.substance)

  Synonym:
  crud, skank
  

  source: wordnet30
• the state of being covered with unclean things(noun.state)

  Synonym:
  dirt, grease, grime, grunge, soil, stain
  

  source: wordnet30
• a state characterized by foul or disgusting dirt and refuse(noun.state)

  Synonym:
  filthiness, foulness, nastiness
  

  source: wordnet30
• an offensive or indecent word or phrase(noun.communication)

  Synonym:
  dirty word, obscenity, smut, vulgarism
  

  source: wordnet30
• Foul matter; anything that soils or defiles; dirt; nastiness.(noun)

  source: webster1913