mastodonian

adjective1

1. •
   Of, related to, or characteristic of a mastodon; large; powerful.

   • The British parliament is now considering the proposition of a Liverpool ship-builder to build six "mastodonian steamships," to be used for the transportation of troops to distant possessions. — 1859

adjective1

1. •
   Of, related to, or characteristic of the American heavy metal band Mastodon.

   • […] expect fiery, blowtorch riffs and scorching solos, thundering bass, fast drumming and a wealth of Mastodonian riffery, the boys have clearly learned from their elders, and learned well! — 2008

noun1

1. •
   (Internet) A user of the decentralized social media platform Mastodon.