"Pomposity" refers to someone who behaves in an arrogant and self-important manner, often exaggerating their own importance or abilities. Full definition
«Mark Carney was absolutely charming, and had none of the typical pomposity of Brits,» Urquhart Stewart told The Daily Telegraph. (ctvnews.ca)
There was neither sentimentality nor purple pomposity in the commemorative words of Cardinal Leo Suenens when he eulogized the late pope before the second session of the Vatican Council on October 27, 1963: (religion-online.org)
Viewers are instead offered up fat - bottom obsessions, a ocean of pretentiousness, and pomposity on the far side of nauseating. (nitrateonline.com)