In the House of the Worm by George R.R. Martin

In the House of the Worm by George R.R. Martin
Beneath a ruined city on a forgotten planet lies a world of plots and revenge. When Annelyn is embarrassed in front of his noble friends by the Meatbringer, he sets forth a devious plan that is meant to gain vengeance. But the terrible truth of the dire White Worm turns his ploy into folly in terrible fashion.
GRRM definitely seems to have channeled HP Lovecraft and Jack Vance for this grisly horror sci-fi story about two underground races who seem to like to eat each other…

Read this before I got out of bed.