Camille Grammer Fighting Back Over Leaked Rant Recording

You may have heard the rant ... in which the former "Real Housewives" star threatens to "desecrate" her boyfriend's baby mama if she leaks private material to the media.

Now, Camille has filed a lawsuit over the leaked recording ... claiming baby mama Lisa Chynoweth PROVOKED her into losing her temper during a January phone conversation -- secretly recording the whole thing.

The conversation was played during a recent deposition in a child custody case involving Chynoweth and Camille's BF, Dimitri Charalambopoulos (say that five times fast). The depo was posted to YouTube (skip to 1:56 for the good stuff).