charisma vacuum Share definition Flag Someone who sucks all the lively-hood and fun out of the room. Generally, a boring or stale person. Man, Moose is a charisma vacuum. Just so boring. Can't even cut a promo while being somewhat interested in what he is saying. Puts me to sleep. charisma vacuum by doomsday519 June 27, 2014 Get the charisma vacuum mug.