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!
Anything that can be acted on with confident success.
I'm guessing it originates from the fact that a wheelhouse is the room on the bridge of a ship where you steer from, providing you with clear view & control to steer the situation.
Have the handsome guy address that roomful of female sales potentials; it's right in his wheelhouse.
Singing this song in that key is right in your wheelhouse.
That pitch was thrown down & out, right in the batter's wheelhouse.