Peak; Bad luck, gutted. When some shit goes down that is bad on your behalf, peak for you. When something bad happens to a mate , peak for them. Effectively meaning bad luck / gutted to fuck. English street slang.
Wasteman: "Shit, My phone battery just died!"

Badman: "Peak for you son"


Homeboy #1 "You got a roach ?"

Homeboy #2 "Na fam , fresh out cuz"

Homeboy #1 "Peak , needed that shit!"
by BASHYSBTV March 07, 2012
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Boy1: my mum won't let me go to the wild party tonight

Boy 2: that peak bro. She's such a bitch
by Deeayycee December 29, 2016
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Term of increasing popularity amongst the urban youth of Londinium, it often comes accompanied with hand gestures replicating the peak of a mountain.

It can refer to an excellent or top quality situation/object/event/person. (1)

Curiously, it can also refer to a very negative situation. (2)
1) Oh man that rave was ^peeeeaak^!!!

2) Dude, your girl is giving you bare shit nowadays, that's peak.
by Inaamace01 February 18, 2011
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When banter is of a whole new level that only certain words can explain it. Jokes may be said to be 'peak' when they are borderline taboo but still cause serious laughter. Any other words that have a similar meaning to peak suck as tip, summit, apogee and brink may also be used to avoid repetition.
Jimmy: Wow that joke is pretty harsh!
Tom: Hahaha!
Jimmy: Yeah who am i kidding? That was peak! WAL!
by Peak_in_Banter July 04, 2011
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Another word for the word muggage or boid.
When something is peak, its a cuss that makes your opponent upset and can't bring comebacks. So basically you have won.
Paris: Oh my gosh!! Why are you so ugly? Your so ugly that they had to invent another word for your ugliness.

Justin: Well, your teeth are so yellow that when its pitch black and you smile people think its morning so they get up. Your teeth is even brighter than the sun.

Simon: That was really peak. That was so peak that she has shut up.
by L(DORT)HypahStah March 17, 2009
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"Peak" most often means "outstanding" or “highest” or “strongest” or “level of skill” or "the best." However in stupid children of the 00s slang for some bizarre reason, it can also mean something really bad.
Holiday Prices reach a peak during August.

Beat the egg whites until they are stiff enough to form firm peaks.

We saw a victory by an athlete at the very peak of her fitness and career.

Or 00s idiot child slang:
00s boy 1: I got my girl pregnant
00s boy 2: that PEAK bro, she such a bitch
by Definitionsaurus January 27, 2019
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Definition One

When something beyond comprehension has happened to you or some one else you know, positive or negative you say the word peak to portray the sheer level of OMG

Definition Two

Peak times are times where life has thrown some crazy stuff at you and everything is just WOAAAAAAAH.

Usually a hand sign is involved which symbolises a mountain peak. If something is that deep the word doesn't even have to be said, you can just do the hand sign

Definition Three
When someone has been embarrassed so much so you feel the need to acknowledge the extent to which they have been wrecked
Guy: My test is tomorrow and I haven't done any work at all!
Friend: Peak times for you

Girl: Did you hear Jessy is pregnant!!!
Friend: PEAK

In Assembly
HeadTeacher: Why are you wearing that belt, its against school regulations, do you think it looks SEXY- because it doesn't
Class: OOOOOOOooo *giggles*
A few members of class: Peak
by Tazzzz February 26, 2014
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