Worm

"Worm" or "Worms" is a slang term for a necromancer and is often used in a derogatory manner. The term references the inclination a necromancer has toward dirt, decay, and anything related to graves and corpses.

The slang term was originally used in the lore of Wraith Knight Bayard of the Worms (7088) to describe the Grave Legion of The Heretic's forces, which consisted of necromancers under Bayard's command.