Short for 'Vampire: the Masquerade'
One of those stupid things we geeks play to waste time. A type of RP/RPG. Be careful while playing this game, as some of the people can be quite deluded and think that they aren't just PLAYING as vampires but actually ARE vampires.
"Did you hear what happened during vampire the other night? (name here) thought he was one of the V:tM chars and not just pretending to be"