So apparently Mastodon instances can create their own custom emoticons, and these get federated when other servers connect in. I know this because in the settings panel I can see everything my instance has picked up over time.
Since I'm the one who runs this instance (and its only inhabitant), this means I am effectively free to add anything I want to my posts, provided I add it to the emoticon list first. Hm...
@captainspam Obviously a nasalfly has to be among the first additions.
@boolean263 True. I think I've got a version of that that'll work.
The very tiny home of CaptainSpam and all the various goings on at Exclaim Industries (which is just CaptainSpam).