variant of psych entry 3
1
—used to say that a previous statement was false or facetious
Psych! Just kidding, man.—Jeff Stark
No train in sight … Sike! Unbeknownst to me, the train was just coming up the hill …—Phase2 (Michael Lawrence Marrow), quoted in VIBE
2
—used to signal coyness or playful deception
… we know who won. But … psych! We can't tell you.—Angela Hill
… Jones raises his hand as if to smack Pericles, then freezes. His posture softens, and with the other hand, he reaches for a single finger to remove his ring … as a gift for Pericles to give to his own bride. Sike!—Lily Janiak
plural sikes
1
dialectal, chiefly British
: a small stream
especially
: one that dries up in summer
2
dialectal, chiefly British
: ditch
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Merriam-Webster unabridged



