To be let down by someone after an arrangement was made. Drop of plans or change of plans at the last minute.
We were supposed to go to the movies, but Jessie flaked on me.

I had plans with a potential buyer but he flaked on me.
by Archangel11111 February 1, 2012
The poor soul who is reportedly the victim of the infamous flaker (or flake). They have likely organised some kind of public outing or friendly get-together, only to be stood up/bailed on unexpectedly with no explanation. They will often try to find the reason for this, but is usually met with a defensive or passive aggressive response, or is just run away from by the flaker (sometimes both). Pronounced "Flake-ee"
Person 1: "As the flakee, I'm deeply offended by your flaking on brunch."
Person 2: "Er...I was super busy sleeping at the time, um, sorry not sorry" *runs away*
by Mickey_G_ April 12, 2019
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
Flaking is what a Nikos does when he make plans with his friends, yet fails to show up last minute. This usually includes the Nikos leaving his friends on read and not telling them about changed plans beforehand.
"Yo, this Nikos is flaking on us today again! That's the sixth time this week, bruh. What an asshole."
by ewrhfoi October 17, 2020
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
Saying you're not going to do something and then ending up doing it at the last minute. Basically, the opposite of flaking out
"Hey, are you busy tonight?"

"Well I told my friend I couldn't come to his party because I thought I'd have work, but I might flake in and go."
by banana_graham April 17, 2019
1. To bail out of something at the last minute

2. To break a contract, verbal or written

3. To lie about a previously made agreement
Miguel: Hey uhh I'll met you up at 7 pm at the walmart cool?
You: yeah sure NP

-7pm-

you: ....

-8pm-
you: .....

-9pm-

you: zzzz
Miguel: oh uhh yeah i cant make it
you: you flaking asshole
by TIm January 6, 2007