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Verb: To cancel previously agreed upon plans last minute, or simply not show up

Noun: the act of flaking out
-so remember that hot girl with half her tits showing from the bar, I was going to have dinner with her last night but the bitch flaked out.

-hot girls are flake outs as a general rule, it's supply and demand man.
by s. mooth criminal September 17, 2008
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2
To cancel previously agreed upon plans last minute or just not show up.
I can't believe he would flake out! He said he would vote to advance Kavanaugh's nomination to the full Senate, however he just announced that he would support the nomination only after a delay of one week for an FBI investigation.
by GEK September 28, 2018
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