Ceòl Beag is the Gaelic-language term for "light music," which in bagpiping includes such forms as marches, strathspeys, reels, jigs, polkas, slow airs, and hornpipes, as well as pipe tunes played in non-traditional idioms such as rock, punk, and jazz. The term is used in juxtaposition to Ceòl Mòr (translating literally as "big music" or "great music" as contrasted with Ceòl Beag meaning "little music").
References
Ceòl Beag Wikipedia(Text) CC BY-SA