I’ve never done a game jam before either. 
I should have linked the other thread, shouldn’t I have?
I assume it’s we all kinda get together, and jam, like people do with instruments (never done that either) and we come up with something great at the end, all making our own little things.
Or maybe it’s like making jam with fruit and you just throw everything into a pot, boil it with sugar and hope for the best.
Okay google tells me
A game jam is a gathering of game developers for the purpose of planning, designing, and creating one or more games within a short span of time, usually ranging between 24 and 72 hours.
I think we all hang out, either on this forum, or we could use a chat room (or likely both), chat, and make our own separate games based around whatever theme’s picked. And we end up with a lot of little games. Although if people want to work in pairs, I can’t see the issue with that either.
We could probably game jam a giant community game too. That’d be a different level of craziness (and possibly fun). If so I’d definitely want to steal Fantom’s idea from the community making game thread. (Unless that thread’s already making @Fantom’s game since then I think we’d need to fight it out.)