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