Since "John Mastodon" has gone so viral here following Mediaite's confusion, I think, in the future, for those folks left on Twitter who want to secretly refer to Mastodon after Elon bans all mentions of it, just talk about "friends of John" as the code...
@mmasnick Story has it that in the 60s, gay men identified each other as “friends of Dorothy,” referring to Judy Garland’s iconic performance in “The Wizard of Oz.”
“Are you, by any chance, a friend of John?”