A flake is someone who generally makes plans with you, promises to do things with or for you but can never seem to follow through. When confronted with their behavior they usually get defensive and run away.
Jane doe promised to go out with me. She never showed up. We made plans saturday night and she came up with an excuse why she couldn't show up. Jane is a flake.
by rubberjohnny7 March 13, 2011
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Somebody who almost never follows through on their word. A true flake will tell you they'll "Totally come" to an event that you put endless effort into organizing up until the day before, and then the day of the said event they're not showing up nor answering your calls or texts. These types of people are the masterminds at taking advantage of your kindness. Their constant flaking out not only succeeds in blatantly using you for your known kindness. No. When you see people flake on you, it makes you feel bad about yourself wondering what you did to make them do something like that. Flaking out subtly says "My time is more important than your time" or, better yet, "Your time don't mean shit to me." Flakes are unneeded negative energy in your life. It is recommended that you keep contact with these selfish pricks to a bare minimum, if at all.
"I have zero tolerance for flakes. Nobody will take advantage of me like that."

"That flake bailed on me at the last minute!"
by BassDude July 20, 2014
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Someone who agrees to do something, than leaves right at the last second. Aka Jaden
Wow, Jaden is such a flake, he always agrees to something , than leaves at the last second. Flake
by NS09 August 30, 2015
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Someone who says that he/she will hang out with you, but then cancels at the last minute.

Someone that you made plans with, but then that person changes his/her mind when you've been waiting all day.

Someone that you plan on meeting, but then that person doesn't hit you back until the next day, saying "hi" like everything is alright or some s*** like that.
Sarah: Yeah, we can hang out tonight after I get off work at 7 PM. :)

Me: Alright, cool :). Just let me know where you want to meet.

*8 PM*

Me: ?

Sarah: Oh sorry, I've just been so busy today. Can we hang out next time?

Me: No. F*** you b****. Wasting my goddamn time. I hate people that flake. Say something if you can't hang out with me so I can do other s*** and not waste time seeing what's up with you.
by Ihateflakes October 20, 2012
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A form of cocaine that is stronger/more pure/better. It will be more expensive but much better.
It's 2 for 50 of the normal stuff or flake is 60 for 1
by The taxi man July 25, 2018
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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
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A person who agrees to do something but never follows through
Colin hay is the definition of a flake
by Gbsparky February 3, 2013
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