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1.
noun: An elaborate prank used to make someone think they have short term memory loss. Just change details around the house and show them a video of stuff that happened in "the future." Like the movie 50 First Dates
John: "I woke up and my family had this video of all my family and friends talking about what's changed in life. They had a video saying Sarah Palin became president.. They even brought out a baby and said it was mine!"

Owen: "hahahaha, you got 50 first dated!"
by Bill Murray Ate My Baby January 10, 2011