Vulgar, a very unpleasant incident or a great disappointment. Derivative from piece-dah, a Russian-originated word. Piece-dehtz is commonly and widely used in speech as an interjecrion, usually bearing no significant sense.
Person-1: What's going on in here?
Person-2: I think a piece-dehtz came over us.

As the latest financial crisis goes around the planet destroying banks and companies, robbing folks out of their little funds, everyone gets to realizing a huge piece-dehtz that has befallen the human race.
by matanZa January 31, 2009
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