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A post put up on social media by a flake made to suggest that they aren't feeling well, made in advance of an event, so that they have a history of not feeling well as an excuse not to show up to the planned event.
I suspect John is planning to flake out on your birthday party tomorrow, he just posted a flakeseed on his wall so we can all know that he's "sick".
by Serendipity37 June 25, 2015
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