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2.
A person who is as crazy as a psycho and as ugly as a cyclops.
Nick: "You're a psychon."
Ali: "What's a psychon?"
Nick: "Look in the mirror, Ali."
by freshmelvinzzz December 16, 2011
 
1.
The smallest, most basic unit of thought, analogous to the atom in matter. From "Gulf" by Robert A. Heinlein (in _Assignment in Eternity_)
The fastest possible rate of thought is one psychon per chronon.
by TANSTAAFL1 September 21, 2012