On one of the romance online communities
I belong to,
we joke about cabana boys.
It is a long running joke
with established members having favorite cabana boys
based on different romance novel characters.
It is easy to slip into short forms
and skip the explanations.
That’s fine for regular participants
but it does tend to exclude newbies.
So the community has a couple ‘hosts’
who slip in explanations.
Instead of saying cb,
they’ll write cabana boy (cb).
When a character is named,
they’ll mention what novel the character is from.
It allows the inside jokes to continue
but not be exclusionary.
Part of what makes up
a tight community
is inside jokes.
You may wish to have ‘hosts’
to help gently explain the inside jokes
to newbies
so they can be part of the community too.