1 definition by Suede_Enema

A slang term used to defame a person after they have been persuaded to believe a false truth.

The modern "Mindfuck" could be considered to convey similar meaning, as "Psych" may be interpreted as "psychologically fucking" with a person.
Johnny: "Hey dude, Vikrum was making fun of your mom because of her breast cancer"

*Eric fights Vikrum*

Johnny: "Yo.. Psych!!!!"
(Vikrum only offered his condolences, and was unjustly beaten for a false crime)

Other variations include "Sike", and "Syke", but it is generally accepted that the term is spelled "Psych" (Based on the Greek word for "Soul."
by Suede_Enema February 10, 2012
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