YUP (Yhdistyneet Urbaanit Puoskarit, originally Y.U.P. Young Urban Perverts) is a Finnish rock-music group. The band arose amongst three students of the Savonlinna senior high of arts in 1987 and played some rather primitive, progressive hard-core punk with English lyrics. Originally the group consisted of Jarkko Martikainen (guitar), Valtteri Tynkkynen (bass guitar) and Jussi Hyyrynen (drums). With the EP Turpasauna in 1990 the language changed into Finnish and the music became more complicated. Soon a fourth member joined the band, keyboardist Tommi Kärkkäinen, since more musicians were needed to carry out the varied ideas of the artists.