Boastful

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