in-joke
US /ˈɪn.dʒoʊk/
UK /ˈɪn.dʒoʊk/
1.
blague interne, private joke
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.
Leur conversation était pleine de blagues internes que je ne comprenais pas.
•
You had to be there to get the in-joke.
Il fallait être là pour comprendre la blague interne.