Dungeon monitor
A person who supervises the play space at a BDSM event or venue, enforces the house rules and handles safety concerns; often shortened to DM.
A dungeon monitor, or DM, supervises a shared play space. Wikipedia’s Glossary of BDSM describes DMs as people who oversee interactions between participants at a party or dungeon and enforce its house rules, sometimes also handing out basics such as water, and its article on play parties says larger events use them to uphold principles such as SSC and RACK. The Portland Leather Alliance’s newcomer guide tells guests to report unsafe activity to a host or DM rather than interrupt a scene, to follow a DM’s instructions without argument, and states that at its own parties DM decisions are final. Shibari Study’s rope jam etiquette does not use the term, but advises taking a worry about someone’s safety to a staff member rather than to the people in the scene, and checking an event’s rules with its organizer.