The sort of person who couldn't possibly be as spiritual, in touch, creative, or otherwise, as they try to appear to be, despite all their best efforts at trying. These efforts include talking about their "deep" feelings a lot, writing deliberately obfuscating text, writing a lot of fairly bad poetry, acting "sweeter" than they really are, sucking up to people in a bat-your-eyelashes fashion. It's actually difficult to define the flakehead. The flakehead must be experienced to be believed.