The practice, nay, ART of making up food as you go along to cover a previous mistake.
Usually used in a professional capacity in Restaurants when you have run out of something, but haven't told the customer, or making something you've forgotten to do.
Chef #1:Hey dude, this bag of prawns isn't cooked
Ninja Chef:Stick them in the Dishwasher
Chef #1:That guy is a true "Cordon Blag" artist.
Chef 1#: We haven't got any lamb curry left
Ninja chef: Just chop up a lamb shank, add roast vegetables, curry paste and microwave. Done.
Chef #1: Isn't that unethical
Ninja Chef: Silence you!