What is the X in X-mas?
word-forming element meaning "mind, mental; spirit, unconscious," from Greek psykho-, combining form of psykhe (see psyche). It also was used to form compounds in Greek, e.g. psychopates "soul-beguiling."
psycho psy·cho (sī'kō)
A psychopath. adj.
psycho- or psych-
Mind; mental: psychogenic.
Mental activities or processes: psychomotor.
Psychology; psychological: psychosocial.
: a special psycho channel that I know nothing aboutnoun
A crazy person; maniac; psychopath; nut: no buzzing broad, no nympho, no psycho, no bitch (1942+)
[probably fr psychotic; the form psychot, ''psychopath,'' is found by the 1940s]