A so called friend who is constantly unreliable and shady. A flake is someone who can think up an excuse for everything but their own existence. The behavior that a flake exhibits is a product of their own desire to manipulate people. A flake will find reasons to ditch a friend whenever that person wants to do something that is not on the flakes agenda. They are insidious beings they do not exhibit this behavior when you first meet them but usually much later down the line. A true flake is not the idiot that they would have you believe.
Bob secretly does not like opera, so he tells his friend to buy the tickets anyways and then does not show up. He calls the friend at the last minute and says he must study for a test. Of course it's the middle of summer vacation though, what a flake.
by JJCarnegie April 16, 2009
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n. An unreliable person; someone who agrees to do something, but never follows through. Someone that you can never count on to eat lunch with or go to a party with.
Jenny is a flake, she told me she'd go to that party with me on Friday, and she found plans with some other girl.
by jdawg051994 September 15, 2010
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a person, friend, or lover that calls you, texts you, emails you, tells you, that they want to hangout and alas they just sit on their fatass and never meet you or get back to you on the reason of their absence. They are big fuckass' that will only cause you many hours of anger and frustration.
He sent me a text saying:
I am gonna see you tonight right? that is the plan?
me:
yeah, call me later and we will be together fer sure.

...................................
and later that night there is well, no meeting, no sex, and NO call.
leaving me to just say:
FUCK THAT FLAKE!!
by hissyhussy March 22, 2006
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Someone who pretends to be your friend but in actuality keeps you around as a last resort and makes plans with YOU but THEY end up not showing or even calling to say their not coming. Usually their always late and have an excuse for everything, most likely this person is a pathological liar as well.
First scenario:

Friend #1 "What time is dego getting here?!"
Friend #2 "Psh he ain't coming, dudes a flake!"

Second scenario:

Flakey individual: "Hey we never hang out, lets do something Sunday!"
Bitter friend: "Ok sure dego" (rolls eyes)
by Erizzle82 June 1, 2010
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Slang. Adjective. Flake is a title applied to people who exhibit "flakey" behavior, which is simple unreliability in regards to social responsibilities. General unreliability includes flakeyness, but involves more; a flake merely fails to recognize their social responsibilities to others, while an unreliable person will often disappoint even themselves. This term also sometimes applies to professional unreliability, where the work involves some social element, resulting in an unfair responsibility distribution.

This can be caused by a wide variety of factors, including laziness, selfishness, a lack of respect, or a variety of manipulative personality disorders.

It is important to note that genuine inability is not actual flakeyness, and the assumption of such is an act of ignorance. A person who is not a flake will consider the consequences of their inconsistency, make a reasonable attempt to inform those it affects as early as possible, and likely attempt to make amends for their failure at a later date. A person who actually has some disability affecting their memory is also not a flake; irresponsibility is not their choice.
Jack and I were told to rake scrap from the work yard. Jack was fine before that, but suddenly got sick and had to go home. Then I had to do it myself. That flake came to work the next day just fine.

Jill asked Tom on a date to see a movie, and Jack agreed. Tom never showed up and wouldn't answer any calls. When she asked him what happened in person, he said he forgotten he had to play poker that night. The flake also missed our poker game.
by Kydo July 29, 2015
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Flake is a particularly potent/strong cut of cocaine. It will be more expensive but the high is cleaner and lasts longer. You'll still end up doing the whole bag though.
'Flake is £50 a gram but much better that the 30 bags'
by The taxi man November 26, 2016
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A Flake is someone who can think of any excuse not to show up to an event. They usually have little or no friends because they never show up to hang out. they are fuckin cunts on wheels who will bail on you at the last minute so they can just sit on thier fat ass an rub one out. Abondon all hope of ever being good friends with a flake. They cause nothing but anger an wasted money on gas an beers.

A Flake may call at the last minute to tell you he or she will not be attending the event or most of the time they wont call at all leaving you sitting there by yourself, looking like a real jerk off. They rarely, if ever admit to being a flake an usually stick to thier excuse that they had something more important to do.
Drew: "Hey are you still down to go to Vegas?!?"

Garrett: "Naw dude I cant, I got a paper to write"

Drew: "BUT ITS SPRING BREAK! Youre such a fuckin flake!"
by llegoz October 16, 2009
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