a loud arrogant boaster
– Merriam Webster Dictionary
I found this word in the reading “The Way We Live Now: 11-11-01; Lost and Found”.
It was used in the sentence, “Although that bit about the Dutch buying Manhattan for 24 bucks might have something to it — there are and always will be braggarts who ”got in at the right time.”
The author uses the word in this sentence to express the way people can be obnoxious, or like used in the definition, arrogant and brag about things that don’t need to be bragged about.