noun (n)

• an expression of lack of respect(noun.communication)

  Synonym:
  disrespect
  

  source: wordnet30
• a manner that is rude and insulting(noun.attribute)

  Synonym:
  rudeness
  Antonym:
  courtesy, good manners
  

  source: wordnet30
• a lack of politeness; a failure to show regard for others; wounding the feelings or others(noun.act)

  Synonym:
  offence, offense, offensive activity
  

  source: wordnet30
• Rudeness of behavior or language; ill manners; manifestation of disrespect; incivility.(noun)

  source: webster1913