swellpridery

noun

Plural: swellprideries

An excessive pride; chauvinism; showinism; inflatedness.

Examples:

—Still, can't he admit even to a small mistake?— Mam was getting disillusioned. —He so unflaggingly gives an impression of a staid earnest man...
—You know our Hubert. Don't you see how unwaveringly he tries to playact and comport himself?
—Men's swellpridery, it is.— particularised Grandma tellingly, leaning towards Mam. (Source: J∙ Okram - The Mystery of the Rammed Key.)