noun

• (psychology, historical) The psychological theory that all human activity (mental and physical) is based on sexuality.
  "And so we are back at pansexualism. It cannot, however, be too often insisted that, though Freud heavily emphasized the element of sexuality in human nature, he utterly rejected pansexualism, which he regarded as a travesty of his theory; and on many occasions he explicitly and energetically denied the equation of all instinctual life with sexuality."
• (rare, chiefly derogatory) Pansexuality.
  "9.10 Polysexuality and Pansexualism. The prefixes pan and poly originate from ancient Greek meaning all and many, respectively. A person identified as pansexual is gender blind. That is, such people can engage in sexual acts with people having any gender [...]. Polysexuality is thus a subset of pansexuality."