I keep saying posts marked as “OC” but I have no idea what that means. Does anyone know?
Reddit has literally none of those features in it’s code so idk what you’re talking about. Some subreddits used the “nsfw” flagging for self-censor/blur but that’s not quite the same thing. “trigger warning” stuff if it was in a subreddit was just manually tagged or used link flair.
Mastodon has explicit technical functionality for these things.
Assuming we are still talking about OC, there’s also a feature to mark a post as “OC” on Reddit too.