boastful Play adjectiveShowing excessive pride and self-satisfaction in one's achievements, possessions, or abilities. SYNONYMS arrogantbig-headedbig-mouthedblowhardbraggartbraggingbumptiouscockyconceitedcrowingegotisticalfull of oneselfostentatiousoverbearingoverweeningproudpuffed upswaggeringswankingswankyswollen-headedvainvaingloriousvaunting