"Extreme arrogance" refers to a level of overconfidence and self-importance that goes beyond normal behavior. It means someone is excessively proud, thinking highly of themselves and believing they are superior to others. Full definition
Instead, what we do in Canada, and in Alberta, is adopt a position of extreme arrogance in arguing that «we will find a made in Canada / made in Alberta solution». (andrewleach.ca)
«The Heat» follows F.B.I. Agent Sarah Ashburn (Bullock), whose extreme arrogance has made her one of the most successful, but despised, workers in her New York field office. (shockya.com)
People with a narcissistic personality, for example, may boast about accomplishments and abilities, exhibit extreme arrogance, and clearly appear to believe in their own superiority. (goodtherapy.org)