A genre of music, that stands for 'Dark Electronic Rock'. It consists of techno sounding characteristics, and often times is in a minor key. Example bands are The Faint, She Wants Revenge, and Shiny Toy Guns. This also may be refered to as Experimental
-'Hey, have you ever heard of 'The Knife'?'
-'I think, arn't they D.E.R.?'