high-and-mighty

Adjective (1)

1. offensively self-assured or given to exercising usually unwarranted power“an autocratic person”“autocratic behavior”“a bossy way of ordering others around”“a rather aggressive and dominating character”“managed the employees in an aloof magisterial way”“a swaggering peremptory manner”Synonyms: autocraticbossydominatingmagisterialperemptory