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When you become frustrated with someone because they are not taking you seriously, are in denial or disbelief.
A shopper is asking a store employee where the eggs are in the grocery store and the employee says they don't carry eggs (when obviously they do), and you're like pshish!

A woman is in labor but husband doesn't believe her because baby isn't due for a week. Woman walks away from husband muttering pshish under her breath.
by La Ti Da March 15, 2014
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