UK hip hop is a genre of music, and a culture that covers a variety of styles of hip hop music made in the United Kingdom. It is generally classified as one of a number of styles of urban music. British hip hop was originally influenced by the Dub/Toasting introduced by Jamaican immigrants in the UK (60s/70s), who eventually developed uniquely-influenced rapping (or speed-toasting) in order to match the rhythm of the ever-increasing pace and aggression of Jamaican-influenced Dub in the UK and to describe street/gang-violence, similar to that in the US. UK rap, or speed-toasting, has also been heavily influenced by US Hip-Hop, although not to the extent many assume. UK hip hop has been widely replaced with grime, however, many British hip hop artists remain producing tracks of this genre.