"Community" as the other replies already mentioned, but how do we abbreviate that? "Sub" worked well imho, but does "com" have the same ring to it?
Any better suggestions?
That'll work when typing things online, but not in f2f conversations. I thought about 'com(m)' which will work, typed out in certain contexts, but I think that sounds too much like other words in several languages including English to use in speech. But if you prepend 'lemmy' to that it's quite a distinguishable word that sounds like 'lexicon': lemmycom(m)!
I might just call them lemmies. Like, I was on a lemmy the other day about X. I guess it is ambiguous with the instances and silly if the community is on kbin or whatever, but also it is easy to say.