Braggart (noun)  : a loud arrogant boaster

https://www.merriam-webster.com/dictionary/braggart

Colsen Whitesead, “City Limits” from The Colossus of New York, page 2

“Except for that bit about the Dutch buying Manhattan for 24 bucks–there are and always will be braggarts who “got in at the right time””

When i first read the sentence I just thought of someone who bragged a lot but I did not think that there was a phrase of something for that. I would just rephrase the sentence so that i could say “someone who brags”. Now I could use that word and it helps to understand the text better instead of just guessing the meaning