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The word you use when you shrug someone off, or just think you're too cool to say anything to someone. Also, it can be used as a comedic way to entertain friends, and I cool silence breaker. Use sparingly as it will become annoying after a while.
Such as:

"Pscha! Leave me alone docta."
"What the Pscha is going on?!"
"Nice dude! Pscha!"
by Matthew Secord February 25, 2004
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