There are currently four artists using this name: 1) American alternative hip-hop musician. 2) Finnish trance artist. 3) Australian speedcore band 4) Belgian Hardcore/Punk Band 1) P.O.S (born Stefon Alexander) is an alternative hip-hop musician from Minnesota. He is a also a member of the alternative rap collective Doomtree. His rapping style is heavily influenced by punk bands such as Kid Dynamite, Black Flag and Fugazi. Alexander began playing punk rock in middle school.