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"

Alternatively-

Homeboy #1 "You got a roach ?"

Homeboy #2 "Na fam , fresh out cuz"

Homeboy #1 "Peak , needed that shit!"
by BASHYSBTV March 7, 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 19, 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 5, 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 28, 2019
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A word describing something that’s too good. You’d use this word to describe how good something was. At the peak of the moment.
Man1: ay that was bare jokes
Man2: yeah! That was peak.
by Nakedsaltt February 20, 2020
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