transvert n Lat. trans, across, over + vertere, to turn; cf. intravert, extravert - a psychological type that alternates between introversion and extraversion and combines features of both types.
I don't know who I am, an extravert or an introvert? Or am I a transvert? If so, then the entire classification crumbles.
His life moves from one extreme to another, from complete self-absorption to wild partying at random places with random people. He is a typical transvert.