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1.
A person who says they're flaking out of an event or other social gathering, and then gets angry at another person for making other plans after the fake flaker said they were not attending.

See also: John Rivera
"John kept saying he wasn't going to Electric Zoo, crying about how money was going to get retrod and that some chick decided not to go, and then got mad when I made other plans...what a Fake Flakey McWhingerson! He's like a woman!"
by Acedelgado July 03, 2012