adj

• (psychology) Pertaining to or promoting the psychological theory of pansexualism.
  "Wilhelm Fliess's critic Henning commented about both Fliess and Freud in this light when he complained of their joint efforts to displace the Darwinian "principle of selection" in favor of a rampant pansexualist philosophy (1910:232)."

noun

• (psychology) A proponent of the psychological theory of pansexualism.
  "Even Wilhelm Reich, who could be described as a more radical pansexualist than Freud himself, could not help speculating on the following lines..."
• (rare, sometimes derogatory) A person who is attracted, or who is able to experience attraction, to everyone and everything.
  "Whitman is a pansexualist. He makes love with, among others, the sun, the night, the earth, the sea, and the winds (W 30, 49, 53). His synecdochic perception results in his genitalized identification with his environment, including the people around him. The spermatic trope works well to explain the nature of Whitman's decentered phallus. If "sex contains all," sperm describes all (W 101). It also works well to describe the nature of his pansexualist eros."