Um Jammer Lammy (ウンジャマ・ラミー, Un Jama Ramī) is a rhythm video game developed by NanaOn-Sha and published by Sony Computer Entertainment for the PlayStation video game console in 1999. It is a spin-off follow up to 1996's PaRappa the Rapper, once again featuring the collaboration of music producer and game designer Masaya Matsuura and artist Rodney...