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In Halo 2, on Xbox Live, the act of purposefully killing yourself to lower your level. Usually done by grundlemuncherswho cannot win any games at the higher levels.
John was a level 30, but he couldn't win a game, so he committed suicide in every game afterwards until he was a level 16 again.

Bernie was a fag, so he deranked.
by Quiksilver June 21, 2006