self-assertion self-assertion /ˌsɛlfəˈsɜːrʃən/

noun

1. The act of asserting yourself in an aggressive manner  ( self-assertion )
   the act of asserting yourself in an aggressive manner
   
2. The act of putting forth your own opinions in a boastful or inconsiderate manner that implies you feel superior to others  ( self-assertion )
   the act of putting forth your own opinions in a boastful or inconsiderate manner that implies you feel superior to others