Brain roughage is information fed to the brain to chew on and digest, in digestible chunks. It is a term lifted from gastronomic language to liken the brain to the stomach, and is of very recent origin. Roughage is ingested to help in food digestion, and is considered good for the system, similarly brain roughage. Other such terms are information snacking and junk, as parallels for the brain. Roughage may be a little tough and needs some exercising to digest, but the grey cells need to work and think before absorbing the information.