Dallas Mavericks' owner Marc Cuban has lashed out on his blog (natch) at fellow billionaire buffoon, Donald Trump, for essentially getting fired, now that "The Apprenctice" has been left off the NBC fall season. Hey Mark, how'd "The Benefactor" work out for ya?!

Cuban slams Trump's real estate/business ventures (Trump Water anyone?) and gives the Combover King backhanded suggestions for staying in the public eye -- in order to remain even remotely relevant. Besides doing the lecture circuit on How to Single-Handedly Destroy Your Own Brand, Mark suggests Donald should try out for VH1's "Celebrity Fit Club" and "I Love New York," or replace his public enemy #1, Rosie O'Donnell, on "The View." Oh lord! And you think Elisabeth is irritating?!

Finally, Cuban challenges Trump to another season of "The Apprentice," Moron vs. Moron -- starring Rosie and the Donald's trophy wife, Melania -- deciding Cuban and Trump's fate in the boredroom. Only if the chair is an option!