boastful

arrogant bombastic cocky exultant pompous pretentious

big big-headed conceited crowing egotistic egotistical full of hot air highfalutin hot stuff know-it-all loudmouth on ego trip puffed-up self-aggrandizing self-applauding smart-alecky snooty strutting stuck-up swaggering swanky swollen-headed too big for one's britches vainglorious vaunting windbag

humble modest unconceited

deprecating