Etymologists believe that bumptious was probably coined, perhaps playfully, from the noun bump plus -tious. (Think of the obtrusive way an overly assertive person might "bump" through a crowd.) When bumptious was first used around 1800, it meant "conceited." Charles Dickens used it that way in David Copperfield: "His hair was very smooth and wavy; but I was informed … that it was a wig … and that he needn't be so 'bounceable'—somebody else said 'bumptious'—about it, because his own red hair was very plainly to be seen behind."
Examples of bumptious in a Sentence
a bumptious young man whose family wealth gave him a sense of entitlement
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