There are multiple artists known by the name 'jammer'; 1. Jammer is a grime artist from Walthamstow, UK. He has worked with grime crews Neckle Camp and Boy Better Know, presented both Lord of The Mic DVDs and recently released his debut album 'Jahmanji'. 2. jammer is a Dutch power trio from Friesland, the Netherlands. As of yet they released one single and one full album, 'Greatest hits', which was released on the 27th of September.