KEITH Olbermann is once again disrespecting the dead. The MSNBC blowhard – who was overheard jockeying for Tim Russert’s “Meet the Press” gig during Russert’s memorial reception in Washington last month – is now inventing a friendship with former White House Press Secretary Tony Snow. Olbermann released a statement after Snow’s death Saturday, calling him “optimistic, funny and courageous . . . While we could not have disagreed more on policy, we were in frequent contact, even during his days as Press Secretary.” But a true friend of Snow’s says Olbermann had “no relationship with Tony, at all.” In fact, Olbermann named Snow his “Worst Person in the World” on Jan. 9, 2007, accusing him of lying about President Bush‘s 2003 “mission accomplished” speech. Olbermann hissed, “You’re just baldfaced lying. You were hired to lie . . . We’re not all third-graders out here.” A rep for Olbermann didn’t get back to us.