An expression of disconcern. It generally means that the speaker does not care about what has recently been said or done.
You: Hey.. you just crashed into a tree...

Me: psshh what are you talking about?
by Rown February 7, 2006
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A sound that indicates disbelief
That PepsiMax has zero calories? Psshh.
by bg1974 January 13, 2011
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