aggressively self-confident biggety bumptious chesty chichi cocky conceited flamboyant immodest know-it-all obtrusive ostentatious overwise peacockish perk perky pert pretentious puffed up self-conceited self-opinionated smart-alecky splashy strutting stuck-up swaggering swank swashbucklering swashbuckling swashing swelled-headed