Quote:
Does flake mean simply not showing up or does it also include girls who refuse to do things on camera that were not discussed or negotiated beforehand? 
Flake = No Show on a Confirmed Booking
The other part you refer to is usually the lazy fucking agent not giving all the details to the talent. Don't even get me started on that soapbox.
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I'd rather be ignorant than stupid.
Ignorance implies a lack of knowledge which is easily correctable through education.
Stupidity implies an inability to learn.
Therefore; ignorance is temporary, stupidity is forever!