in-joke

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

內部笑話, 圈內笑話

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.
他們的談話充滿了我聽不懂的內部笑話
You had to be there to get the in-joke.
你必須在場才能理解這個內部笑話