This one was scary. I was smoothing the normals out on the tounge (which was already skinned) so when I went to delete the non deformer history I accidently selected through the tounge and deleted some curve history that broke the boob/ass jiggle physics. It was an error I only encountered once before and haven't been able to reverse engineer or fix since. I was only lucky because I planned to remake the mouth controls and that file is the only one that had all the tweaks and fixes I added to my succubiV2 rig in the meantime, sans mouth controls. So I had to rebuild the mouth controls, but other than that I'm golden.

Remember the most important rule of 3D: save often and save in increments. It will save you weeks of frustration and heartbreak.