Idiom may refer to a funk metal band from Exeter, England or a progressive hard rock band, hailing out of Raleigh, NC. Both were formed in 2005.
These are photos from concerts where Idiom played, so they may be of other bands that played the concert as well.
Download Festival 2013 Jun 14 - 16, 2013 Castle Donington, England, United Kingdom Uploaded by Thekilburnoracle
Download Festival 2013 Jun 14 - 16, 2013 Castle Donington, England, United Kingdom Uploaded by Josh King