Brooklyn stand up. Even the most accomplished artist has the one that got away. For Fabolous, it’s Nas and Eminem. For Young M.A, it’s none other than the Jigga Man himself, as evidenced by a recent conversation at Sirius XM. “I still want to work with Jay-Z bro,” says M.A., wasting little time in issuing her response. “I just feel like it’s …