DON’T mess with Karrine “Superhead” Steffans. The former girlfriend of television pundit Bill Maher spits fire at her ex in next month’s Vibe. She says, “Bill wants someone he can put down in an argument, tell you how ghetto you are, how big your butt is, and that you’re an idiot. That’s why you never see him with a white girl or an intellectual. I might as well have been a Muslim woman with my head wrapped, walking 10 paces behind my man. [But] I couldn’t be ‘Bill Maher’s girlfriend’ any more – not when I’m Karrine Steffans . . . best-selling author.”