toot

He gave a little toot of the horn, to get their attention.

So he took a toot. A couple of days later he did another, then another. Soon Harry was using more coke than he had done in his whole life.

I'm not paying fifty pounds for this load of old toot!

As for layout, Mastodon feels a little like TweetDeck, with columns for your toots, toots from the people you follow, your mentions, and (unlike Twitter) a timeline of all public posts being shared by every user on the platform.