Chap-hop

Never wear plimsolls if not doing sport Unless you're a chap-hop superstar sort

Source: wiktionary

Any style of music can become steampunk if the story is right. Thus the rise of a seemingly incongruous pairing: steampunk rap, or chap-hop.

Source: wiktionary

[…] the compliment has now been returned, with the rise of a style known as chap-hop, in which people in tweeds such as Mr B the Gentleman Rhymer freestyle over a banjulele accompaniment barbed songs of political comment such as 'They Don't Allow Rappers in the Bullingdon' (2012).

Source: wiktionary