In the Greek, Boasters is Alazon which means empty pretender or boaster. Thesaurus.com lists various synonyms including blow hard, braggert, big mouth, know it all, show off, and grand stander. (Ouch) Brian Regan is one of the greatest comedians of all time, has a stand up where he called boasters, "Me Monsters", check it out:
As lovers of self, we are naturally inclined to this behavior. Social media has given us a world wide platform, it is often nauseating. From my own experience, I was a boaster until the Lord took me down... often boasters have never known failure. The work of their hands has been so blessed they believe they are indeed better, smarter, and more accomplished. They believe of themselves that had they been born in Haiti they would have risen above their circumstances and prevailed - they are wrong. Extreme poverty, hunger, danger, illness is not overcome by force of will alone. Lacking proper basics in childhood stunts growth and intellect - so boasters believe more highly of themselves. The bible warns, "Be not wise in thy own eyes." Proverbs 3:7
Boasters have been around since Cain and Abel - perhaps it was Cain bragging to the Lord about his sacrifice that sparked his murderous anger toward his brother. Cain's sacrifice was one of his own effort as a farmer, while Abel's was a sacrifice of his flock. Ephesians 2:8-9 clearly demonstrates the principal at work in the story of the original brothers. "Lest any man should boast."