"Not-jokes" were made popular long before the Borat movie, namely in the movie "Wayne's World" from 1992.
Filled with pop culture references, the sketches and film started catchphrases such as "Schwing!" and "Schyea", as well as popularizing "That's what she said", "Party on!" and the use of "...Not!" after apparently affirmative sentences in order to state the contrary (as used by the metal band Anthrax in the late 1980s and early 1990s). This form of joke became known as "not joke".
by LeRouxToto May 26, 2010
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Telling a joke and someone taking it seriously but are too embarrassed to admit it, so they try to cover it up with another joke.
Girl #1: OMG that shirt makes you look fat.
Girl #2: It's just the material!
Girl #1: I was just kidding..
Girl #2: Oh, yeah I know; me too.
Girl #1: No joke on joke.
by Melanieee June 10, 2008
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1) A type of statement or question that sounds or looks as though it is humorous, but is in fact, not in any way funny. Also called a non-entendre. Usually simply a reference, or a non-sequitur that is not even accidentally funny. Followed either by the phrase "get it?" or by immediate, raucous laughter if the audience are hipsters. (Hipsters are notorious for laughing at jokes they don't understand, to feign comprehension.)

2) A joke similar to 1., but with the intention of frustrating or confusing the audience, rather than pleasing them.
1) Bill: I drank so much milk I fell down, and I was like, whoa, what is this, Terminator 2?
(A minute of silence)
Mike: Bill, that's a lone, confusing reference, not a joke. It is also not a witty observation. You have now performed a hat trick of no-joke jokes, and unless you stop talking, we will throw you out of your own party.

2) An intentional No-Joke Joke:
Q: What is the difference between a duck?
A: One of it's legs are both the same!
by The Great Pumpkin February 10, 2009
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When a joke is quickly followed by more supplemental jokes building upon the comedic situation ultimately resulting in mass humor hysteria.
HAHAHAHA, omg George I can't believe how many jokes you just told, you got jokes on jokes!
by curious george88 April 13, 2010
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If I'm planning to throw a suprise party for one of my friend's birthday. He is the only one who's NOT in on the joke about the party.

(Special thanks to one of my Canadian friend)
by Gunhyoung August 18, 2006
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