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1.
(n)The tendency for youtube users to either thumbs up or thumbs down a comment that has already been rated in order to bring the said comment's rating to (or closer to) the neutral 0 mark.
Youtube Teeny Bopper: HAI GUISE LOOK @ DIS

douchemaster69 (1 minute ago) -1
THIS SONG IZ RLY GHEY

Youtube Teeny Bopper: O NOES I GOTS TEH Youtube Comment Homeostasis I BETR THUMS UP DIS GI SOH HIZ RATN IZ "0" !!!1!ONE!
by K-MAGIC April 30, 2009