Yasiin Bey Revives 'Mos Def' Moniker for 'Sensei on the Block'

Nearly four years after Mos Def announced that he was retiring his name and becoming Yasiin Bey, the rapper has dusted off his old moniker for “Sensei on the Block,” a surprise collaboration between the rapper and producer Ski Beatz. The track, which appeared on iTunes today with little warning, finds Bey –…