verb: To dress in flashy or outlandish clothing to attract women.
alternately: To show off for women.

A guy who acts normal around people he knows/is used to but gets loud and starts acting like a douche (similar to a peacock in mating season) when around, but not limited to, attractive women. This can also apply to women but that term would be defined as shecock.

Normally an English gentleman - Dresses smartly and to an untrained eye has the look of a preppy - They have exceptional etiquette and are from wealthy backgrounds - Peacock's have class.

They don't shop for Jack Wills or try to follow the trend - they have a unique style.

A man holding court with ladies. Comes off in a non-subtle, vain and superficial manner.

A girl that looks awesome from the back, but busted from the front. Not to be confused with a butter or butterface (but-her-face) who has a hot body and a busted face. A peacock will have a jlo booty and tiny waist, but lopsided titties and a face that resembles what you saw in the toilet after you last all night drinking binge bacon dog cart adventure.

<name for a girl or female who thinks she is much better than anyone else>

An attractive (usually homosexual) male that is obsessed with mirrors. He is generally preoccupied with and often vain about his clothes and manners