A person whom upon entering a room of people, has the innate ability to withdraw all feelings (both negative and positive) from those already present in the room. The effects of a mood-sucker on the recipients are depression, boredom and a complete lack of interest in all things to do with life in general.
The moment she entered the room, you could tell she was a mood-sucker.
by Etak_soda August 21, 2011

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