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.
Last night Phil saw this hot chick in Starbuck's and he was about to make his move on her until this total douche came along and started being a peacock. Needless to say she ran off and he was left watching bestiality mongoose porn again...
by Bobby Dowell March 18, 2008

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Slang term for a Drag Queen who is very attractive and well put together in both male and female form. Sometime's their "feathers" are up, sometime's they're down, but they are always pretty.
"You think she's hot now? You should see her as a boy. He's a total peacock!"

"That's YOU in drag? Wow, you're a peacock!
by lex16 September 02, 2010

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Annoying, that has wacky hair and loves to post mumble. Likes to be popular but is not. Trys to get people in trouble.
Nerds,animals, peacock
by Peacock333 April 02, 2009

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to achieve alpha male status within a group.
When the young man spit game at the girl he achieved peacock status. He peacocked his friends that night by showing all of them up.
by P. Cock April 15, 2008

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A creature that appears in nightmares.

A member of the Muppet species, this entity stalks the dreamer, perhaps with other Peacocks. This attitude displays a pack mentality, although it is unconfirmed if Peacocks hunt in packs.

The Peacock's physical description is best captured by the image of a bald, purple-skinned, green nosed, toothless, love child of Ernie, Grover, and Dr. Teeth with half-closed eyelids.

In the first stages of attack, the dreamer will be with acquaintances when the dreamer has to get a drink of water. Upon heading for the sink or drinking fountain, the floor will turn to ice, all acquaintances in the dream will begin to exit the area, leaving the dreamer alone. At this point, the Peacock will emit a laugh that mirrors exactly the laugh of Statue-Ernie in the episode of Sesame Street where Bert and Ernie explore a pyramid.

The final stage of attack will be when the prey (you, the dreamer) will attempt to run on the ice-floor. Attempting to make it to the exit, the dreamer will be blocked from the exit by the Peacock jumping in front of the dreamer. The Peacock will laugh in victory before swallowing the dreamer head-first similar to an anaconda.

This nightmare may repeat itself, although scenarios may differ. If the dreamer has the presence of mind to not get a drink, the Peacock will still hunt. The only defense against Peacocks is to stay in a group and not get a drink of water.
"Peacocks appeared last night. I managed to stay with the group, but at night, it's hard to stay with everyone. In the end I was walking down a path away from the group when the Peacock appeared. I knew then that it was all over."
by Peacock Analyst March 11, 2008

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To abruptly backhand slap the person to your left.
Marissa peacocked Nikki in the car.

Tell that bitch I'm gonna fucking peacock him.
by Marissa Schachman February 19, 2008

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Someone who flaunts there social life on facebook.
Joe Blow's Status - i am going to the toilet
FB Friend -Joe Blow is such a peacock
by crappy stackie June 22, 2011

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A man who dressed up, done hair and posed for a profile picture to try make himself look good but resulting in looking like a complete melt.
me: dude have you seen this pussys profile pic.
friend: i know man what a fucking Peacock.
by jerkcrackhead November 18, 2010

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