The state of being bumptious; conceitedness.(noun)
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Use "bumptiousness" in a sentence
"Leon looked after him rather disconsolately, as though at a loss to understand what could have happened to take all the fight and "bumptiousness" out of the former bully."
"Surely if a new student shows, in the language of cant, "bumptiousness," the older students could "take him down" by dignity of manner or quiet sarcasm, rather than descend to the level of the blacking brush."
"And who is to settle as to what is "an intelligent public opinion," that has the right to put down "bumptiousness"?"