noun (n)

• audacious (even arrogant) behavior that you have no right to(noun.attribute)

  Synonym:
  assumption, presumption, presumptuousness
  

  source: wordnet30
• Impudence or boldness in confronting or in transgressing the bounds of duty or decorum; insulting presumptuousness; shameless boldness; barefaced assurance.(noun)

  source: webster1913