NeNe Leakes -- Kenya Moore Is a Total Fake ... Right Down to Her Ass

NeNe Leakes isn't afraid of a fight -- even when it's not hers -- and she took a huge dig at Kenya Moore in the wake of the "Real Housewives of Atlanta" reunion show brawl.

As we told you Porsha Williams attacked Kenya during last week's taping -- Kenya even made a ridiculous 911 call -- but last night at Mr. Chow NeNe backed Porsha, telling us ... "Kenya stupid. She need to fix her fake booty."

A clear shot at Kenya's "Booty Camp" workout (which seems like the ONE thing for which she shouldn't be attacked).