Trip Hop is a style of Downtempo music that grew out of the Bristol underground in the early 90s. The term was originally coined by Mixmag in a review of DJ Shadow but it wasn't until the mid 90s that the term's definition was solidified to define the emerging Bristolian scene of Downtempo from groups such as Massive Attack and Portishead, both of which went on to have large commercial success in the UK.
The fundamental trip-hop tempo is slow, slow but relentless, presided over by immense bass figures, as deep but less booming than those of house music. There are lots of rhythm drop-outs, as in dub, and inserted snippets of instruments or noises proliferate wildly in the cleverest mixes. The tone of many trip-hop numbers is sleepy, jaded, but the lyrics -- sung in a smolder by women, being loved softly -- spring, likely as not, from the raw wounds of social or romantic anguish.