When someone really screws up and you think there's going to be hell to pay but they somehow get away with it.
It comes from Admiral Piett in Star Wars. After the millenium falcon goes into hyperspace in the Empire Strikes Back, you just know Vader is going to strangle Piett like all the others who "failed him". But... he doesn't.

(Piett survives until the next movie, finaly dying when a rebel A-wing fighter crashes through the bridge of his ship)
by Dirge September 29, 2004
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Piett was a loyal Imperial officer aboard Darth Vader's flagship, the Executor, during the Hoth campaign. As an attentive Captain aboard the Super Star Destroyer, he was more creatively minded than his by-the-manual superior, Admiral Ozzel. After Ozzel committed a fatal mistake during the hunt for the Rebels, Darth Vader promoted Piett to Admiral in his place.
Piett served in this capacity during the Battle of Endor. He perished aboard his vessel when a wayward A-wing starfighter crashed into the Executor's bridge.
Admiral Piett profile from starwars.com
by P.redeckis June 07, 2006
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When you bang a newly pregnant chick (not your kid) in a friend's tent, then take a shit in the tent before you leave.
"I gave that chick a Dirty Piette in Tim's tent last night."
by Johnand Mags March 31, 2008
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Ms piette is the most amazing person you will ever meet. She may be a lot to handle in the begging but as you settle in she will warm your heart.
by Hello m November 03, 2019
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