peacock

/ˈpiːkɑːk/
noun
  1. A large, colorful bird with a long, bright tail that it can spread out like a fan, especially the male.
    • We saw a peacock walking gracefully across the lawn.
    • The peacock spread its feathers in a dazzling display at the zoo.
    • The garden was home to several peacocks with iridescent blue and green plumage.
  2. A person who is very proud of their appearance or achievements and likes to show off.
    • Don't be a peacock; humility is more attractive than showing off.
    • He's such a peacock, always bragging about his new car.
    • The actor strutted around like a peacock at the premiere.
verb
  1. To behave in a showy, proud, or self-important way; to strut or show off.
    • Stop peacocking and just be yourself.
    • He peacocked around the office after winning the award.
    • The model peacocked down the runway with exaggerated confidence.
Synonyms