peacocky (?.)

• 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