The male of the peafowl species (especially Pavo cristatus or Pavo muticus), known for its large iridescent tail feathers that it can fan out in a spectacular display.

A peacock was calling loudly as it spread its brilliant tail in the courtyard.

A person who is very proud or vain, often showing off or seeking attention.

He was such a peacock, always boasting about his achievements at every opportunity.

peacockverb

To behave in a way that is meant to attract attention or admiration, often by showing off or being ostentatious.

He loves to peacock around the office, always boasting about his latest achievements.

To display or flaunt (something) in a showy or ostentatious way.

She peacocked her designer handbag at the party to make sure everyone noticed.

peacockadjective

Of a blue-green colour or iridescent quality similar to that of a peacock's tail feathers.

She chose a peacock dress that shimmered under the ballroom lights.

Ostentatiously showy or flamboyant.

His peacock outfit drew all eyes the moment he walked into the hall.