The group was formed in 1994 by Ryo-Z and Ilmari, who were later joined by Pes (he attended the same school as Ilmari). The Rip in Rip Slyme stands for their initials. Slyme was a popular children's toy at that time. Their name is also a pun on the phrase "lips' rhyme". Winning an amateur rapping contest "Young MCs In Town", they started their musical career with their first album Lips Rhyme in 1995. Later they added DJ Fumiya (who had studied under East End X Yuri's DJ Yoggy) and Su (previously a backup dancer for East End X Yuri). In 1998 they released their second album, "Talkin' Cheap" and also took part in Dragon Ash's Total Communication event.