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 for the PlayStation video game console in 1999. It is a follow up to 1996's PaRappa the Rapper, once again featuring the collaboration of music producer and game designer Masaya Matsuura and artist Rodney Alan Greenblat. An arcade version co-developed by Namco, titled Um Jammer Lammy Now!!, was released in Japanese arcades in December 1999. The game was later re-released on PlayStation Network between 2008 and 2012.

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 for the PlayStation video game console in 1999. It is a follow up to 1996's PaRappa the Rapper, once again featuring the collaboration of music producer and game designer Masaya Matsuura and artist Rodney Alan Greenblat. An arcade version co-developed by Namco, titled Um Jammer Lammy Now!!, was released in Japanese arcades in December 1999. The game was later re-released on PlayStation Network between 2008 and 2012.