look up any word, like blumpkin:
A confusing/disappointing person whom you have misjudged as a reliable, caring friend. She can call and talk for hours about herself but the minute you speak of yourself she has to get off the phone. She asks for favors and, even if you set parameters to which she agrees at first and promises she'll abide by them, she'll use them later to excuse herself from the scheduled activity. She'll pick your brain and take the credit for your originality. She will amplify her competence. She will lie to avoid confrontation and make herself the victim when confronted. In order to quit being disappointed, I never make any plans again with the Flake.
Flake: Would you come over and help me with my riding?
Me: Okay but I will need a ride there and home.
Flake: Sure, no problem.
Me: Okay, see you tomorrow at ten.
Tomorrow at ten comes and goes. She texts me five hours later saying she had to go to the dentist. In the meantime your other friend calls to say she went riding with the Flake during the time the Flake was supposed to be at the dentist.
by christy2011 April 27, 2011
n. An unreliable person; someone who agrees to do something, but never follows through.
1. John called in sick to work again today. He's such a flake.

2. Mary said she would do the research for our project, but it's been a week and she hasn't done a thing. She's such a flake.
by Gargouille May 29, 2005
(verb, oftenly used with "out") - To decide not to go at the last second; To "ditch" or "bail out."
"You said we were gonna go see the movie! Don't change your mind and flake out!"

"Damn, it's been an hour since we were supposed to meet. I bet she just flaked out on me."
by Patrick March 18, 2003
(n) A useless, shady, deceitful person who is so unreliable and selfish they cause you much anger and frustration. A Flake's only agenda is what they want to do. They have a weak character, often the products of bad parenting/spoiling kids. A Flake will make plans, never attend, and give no reason for their absence, even after they spent hours calling, texting, or emailing you. Flakes try to manipulate everybody, and sometimes are not the idiots they appear to be. A Flake often has little to no real friends due to their erratic behavior. You can never rely on a Flake. When questioned about their behavior, a Flake just gives up on the relationship and moves on to another person. Flakes can't get by in the real world and often act immature beyond their years, causing them to be labeled as "useless" human beings.
This girl called 15 times in one day and we decided to go out that night with some other friends. She arrives at the our meeting point, walks right by me like she doesn't know me, sits down with somebody else, and then proceeds to leave with them. Then, she stops answering her phone even though I know she sees my calls. A week or so later, she calls me again because she has nobody else to hang out with and wants to do something. However, she avoided all my phone calls for a week. Then she got mad when I confronted her about it. That's when I understood why people used to tell me she was "a useless flake" who still lives at home with her parents. When she was mentioned in a conversation someone always used the word "flake" in there somewhere.
by DirkDiggler88 August 25, 2009
n. - someone who is unreliable.
we knew chris wouldn't show up 'cuz he's a flake.
by baron S July 20, 2005
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?
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:
by hissyhussy March 22, 2006
A Frequently unreliable person who says that they will do somthing or attend somthing, but never shows. Usually this is done without notice.
"Alex isn't here yet, we need to start playing poker!... I bet he flaked again"
by John70 October 11, 2007
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