in-joke

US /ˈɪn.dʒoʊk/
UK /ˈɪn.dʒoʊk/
"in-joke" picture
1.

内部笑话, 圈内笑话

a joke that is understood only by a small group of people who are familiar with a particular subject or situation

:
Their conversation was full of in-jokes that I didn't understand.
他们的谈话充满了我不懂的内部笑话
You had to be there to get the in-joke.
你必须在场才能理解这个内部笑话