dungeon master

noun4

1. •
   A man who manages a dungeon (an underground prison or vault).

   • “Jamis is gone? How?” “I don’t know, sir.” […] “Did the dungeon master see anything? Does he have a clue who might’ve helped? I want to speak with him right away.” […] “The dungeon master is dead.” — 2017
2. •
   A game master in Dungeons & Dragons games.

   • Nicholas and his black-masked companions waited with feet planted apart as the dungeon master fumbled for his key ring. — 1998
3. •
   A man who manages a dungeon (a room dedicated to sadomasochistic sexual activity).
4. •
   A man who supervises a dungeon (a room dedicated to sadomasochistic sexual activity).

   • Usually, the dungeon master clears away play items and lets the couple head to the cooldown area. — 2003