Someone who completely leaves people hanging constantly, this person will constantly cancel on plans or do things on their own without any care of whether a friend would like to join them.
"Yeah, Porkins is such a fucking flake. He never wants to hang out with us and constantly would rather do things on his own."
by Failur3 August 21, 2017
Get the Flakemug. A twitch streamer who promises their viewers a 24 hour stream but quits very early. This behavior is typically seen in male tft streamers who make fun of people on the autism spectrum and use attractive female streamers as beards.
Steve - "Yo Dave are you excited for K3soju's 24 hour stream tomorrow?" Dave - "hahaha excited? that dude is a hardcore flake. I'd be surprised if he lasted 6 hours."
by BlenderResidentSleeper December 26, 2019
Get the Flakemug. A person who is always bailing on plans that they make. Once or twice is understandle but multiple times just shows that they dont care and it's who they are. Unreliable
Don't invite that dude bc he will always tell you he can do something but then at the last minute he will bail. He is just generally flakey.
by SHS22 December 18, 2017
Get the Flakemug. (verb) The verb flake is probably derived from the noun flake. The verb means to act like a flake by being unreliable, particularly by not showing up at an agreed upon time or place.
by BoyntonZ June 7, 2016
Get the flakemug. A confusing/disappointing person whom you have misjudged as a reliable, that continues to vote party lines.
And is appropriately named Jeff Flake, the Arizona Senator.
And is appropriately named Jeff Flake, the Arizona Senator.
Jeff Flake called for a postponement of the Kavanaugh vote, as if he cared. Then flaked out and voted with the party of deplorables anyway.
by Angry snowflake in Detroit October 7, 2018
Get the Flakemug. 
A flake is a person of weak character. When the going gets tough, they can't handle it and give up. They tend to be the end product of parents that spoiled them rotten. Many upper middle class kids who had parents that gave them cars, toys, nice clothes and did not make them work as teenagers turn out to be useless flakes that have no concept of how to get by in the real world. Flakes tend to let their emotions get the best of them. You can tell right away if a girl is a flake because as soon as she gets dumped by her boyfriend, she is crying and sobbing to her best friends over a cell phone. Flakes are not reliable when it comes to following through on their commitments. They are used to having it easy so when they fail, they break down and blame their weakness on their friends. Flaky parents don't have the balls to discipline their kids so their kids turn out to be useless spoiled brats that couldn't change a flat tire to save their lives and waste their time on facebook, texting and shopping. Although flaky women tend to be very attractive, they are incredibly boring to be with because all they do is watch MTV and follow the latest scandals of Hollywood.
Flakes make me sick. They are sore losers who drift through life like lumps of crap because they can afford it for one reason or the other.
by Cecil-1984crem March 8, 2009
Get the Flakemug.