Slang & Culture
Megameetup
A multi-day gathering of the rationalist and LessWrong community, larger than a regular city meetup, where people travel in from a region to spend a weekend together — often timed around a Secular Solstice. Sessions tend to be informal talks, games and discussion, including about AI risk.
Origin · no single documented coiner
Community usage on LessWrong and in regional rationalist groups; no individual coined it. The annual Solstice round-up threads list megameetups alongside solstice events.