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1.
Apple sauce. Why? because Ryuk the shinigami only eats APPLES. Therefore his puke would most likely resemble apple sauce!

La Puke De Ryuk is a humorous term that Death Note fans can use to put gross out other Death Note fans, if they happen to be in the presence of apple sauce. Here is an example:
DeathNoteFan A: "Hey, what are you eating with that pork sausage?"
DeathNoteFan B: "Apple sauce."
DeathNoteFan A: "Ah! La Puke De Ryuk! Tres Bon!"
DeathNoteFan B: "Eeeeew! Gross! Thanks a lot!"
by Uberkawaiidouche January 27, 2011