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An Inside joke that you have with yourself, and no-one else.
Typical of people with no friends or imaginary friends.
Person 1: 'heeheehee... Yoga Pants...'
Person 2: 'what are you laughing at?'
Person 1: 'Inself Joke dude... heeheeehee.'
Person 2: 'weirdo'
Person 3: 'I bet he has no friends.'
by ToastedUnicorn December 01, 2013
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