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When you re-tell A joke, funny part of a movie or show, or comedy routine to someone and it's far less funny than when you yourself heard it, Also, the teller usually cracks up halfway through, further ruining it.
"Dude I saw this awesome stand-up last night, the guy was like..."

"Woah keep that second hand funny away from me dickhead."
by blobygook May 23, 2013
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