Boastful

arrogant big big-headed bombastic cocky conceited crowing egotistic egotistical exultant full of hot air hifalutin hot stuff know-it-all loudmouth on ego trip pompous pretentious 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