Group Meme
your friend forgot the work for inside joke and being the meme loving shit they are inserted "group meme" in the hole of shame where inside joke fits.
Friend: oh, that's definitely a new group meme
You: wtf is a group meme
Other friend: did you mean inside joke?
Friend: yes...
You: wtf is a group meme
Other friend: did you mean inside joke?
Friend: yes...