insubordinate

/ˌɪnsəˈbɔrdənɪt/
adjective
  1. Refusing to obey authority or follow orders; rebellious.
    • The soldier was punished for being insubordinate to his commanding officer.
    • Her insubordinate attitude got her suspended from school.
    • The manager fired the employee for insubordinate behavior during the meeting.
noun
  1. A person who refuses to obey authority.
    • The principal called the insubordinate into his office for a talk.
    • The sergeant had no patience for insubordinates in his unit.
    • Every team has an insubordinate who challenges the rules.