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1.
WCPGW- A statement of unbridled optimism and also an immediate trigger for Murphies Law. Generally uttered at meetings followed within seconds by a cascade of unexpected and horrid consequences.
What are you doing today?
Cleaning windows on the World Trade Centre, "What could possibly go wrong"
by Captkap March 13, 2011
 
2.
The thing you say when you're about to do something really stupid that will, without question, go wrong.
"I'll just swim through this pit of crocodiles like a baws. What could possibly go wrong?"
by Derpalina January 16, 2013