personally, i always thought a black job was the kind of job that the russian who got released from german prison yesterday did.
Funny side story on that front - a former ausa buddy used to handle a lot of national security cases in his district. there was this guy who was basically a black bag guy who'd tap foreign embassies. as he was approaching his retirement, he got into a pissing match with the agency about what service level he would retire at, and the agency denied him what he was asking for. So he retires, and hangs up a shingle selling "foreign embassy security services". agency goes bananas and looks to lawyer for ways to enjoin him, to which lawyer responds "don't you guys have other ways of dealing with this sort of thing?" agency guy responds, "yes, but only on foreign soil." long story short, the guy pretty quickly realized how much trouble he was in.