Misspelling of slang term "psych", which is short for "psyched out". It can be used at the end of a statement intended to psychologically cause its recipient to be taken off guard or aback, hence allowing for a competitive advantage by the person using the statement. It is intended to be used, & then its success is to be pointed out publicly, as further source of creating an embarrassing competitive edge.
Hey Joey, your sister let me see her naked last night. Sike!
An slang term that began in the late 70's. The word sike is used to negate what ever statement might have come before it. It basically means, "just kidding" or "yea, right". Usually, a pause is given between the original statement and the "sike" as to see if the original comment caused a reaction, before people realize that the person was just kidding. It is used in exactly the same way "Not!" was used, when coined by the Wayne's World movies.
George Bush is the greatest president ever... Sike!