n. - someone who is unreliable.

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.

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.

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.

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.

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.

A person who agrees to do something but never follows through