A "type of dance music, played on electronic instruments and with a slow beat", according to Longman Dictionary, trip-hop (also known in the past as the "Bristol sound") is, in fact, a musical movement that started in Bristol, UK. The tag isn't limited to Bristol-based bands though; bands as far as Canada (eg. Perfume Tree) or Costa Rica (eg. Úztari) have been considered 'trip-hop'. Many 'trip-hop' bands like Massive Attack, Portishead or Tricky have denied the term though, claiming it to be "an invention of media journalists". Read more on Last.fm.