Dennis in this case the sum of the parts is greater than the whole.......
(wink)
"dungeon" and "master" are exactly as you say, but used as "Dungeon Master" that way is originally a reference back to the heady days of playing "sword and sorcery" type games, eg Dungeons & Dragons and later many other similar type games.
"In the
Dungeons & Dragons (D&D)
role-playing game, the
Dungeon Master (abbreviated as
DM) is a selected player who describes the game to the other players. In effect, the Dungeon Master creates the entire world and allows the players (the DM is usually not described as a player) to interact with that world."
Ucht ... if you want the beanie just pay the bucks like the rest of us did, or the DM may decree that you've been hit with a High Accelerator spell!
http://en.wikipedia.org/wiki/Dungeon_Master