Kanye West is under investigation for attacking an 18-year-old man inside the waiting room of a chiropractor’s office for calling Kim Kardashian a slut and a nigger-lover.  Kim was at a Beverly Hills medical building when she was swarmed by photogs.  The guy tried to help Kim get in the building, as he started screaming, “Fuck these faggot-ass niggers” — referring to the paparazzi. Kim then told him it was not appropriate to use the N-word. Then he screamed at her, “Fuck you bitch. Just trying to help you. Shut up nigger lover, stupid slut.”  Apparently that got Kim hot as fish grease … she watched the guy walk into an office. As they were walking the guy continued berating Kim. She dialed Kanye on his cell, and when the guy realized Kanye was on the phone he allegedly said, “Fuck you Nigger.” Kanye — who had just arrived at the building — then met up with Kim.  Sources say Kanye and Kim rushed into the waiting room of chiropractor Richard Hill and found the 18-year-old sitting there. Witnesses say Kanye punched the guy and Kim screamed, “We have it all on tape.”