He turned to the father, and spoke with an air of boastful good nature.
“I am a night cabby, I am,” he whispered, with a sort of boastful exasperation.
His boastful accents died away into a mumble: "Dunno what I should do."
False and boastful conceits and phrases mount upwards and take their place.
"Unaided I walked here from the house," he informed her with a boastful air.