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If someone is undercover funny, they are funny when you are not around them.
"Matt is such a boring guy."
"No man, he's funny when you're not around him. He's undercover funny."
by Shaved Deer October 22, 2011
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2
Could also be someone who is not the same when you're not there like a back stabber being ''funny'' doesn't always mean humor could also mean wierd
This nigga sean might be undercover funny because he acts different doesnt believe in the same things when he is not in around certain people.
by Passingmindset May 25, 2016
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