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A joke originated or appreciated by the members of a particular group.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a joke which is understood only by a particular group of people
a joke that can be understood or appreciated only by a limited group of people.
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|Noun||1.||in-joke - a joke that is appreciated only by members of some particular group of people|
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