Oh, how dumb! I found an old container half full of yogurt in the back of my fridge. Because I'm a big recycler, I did not toss the whole moldy thing in the trash - I flushed the contents down the toilet. Now it's slowing the toilet. I've flushed & flushed, and I've plunged & plunged, but to no avail. Then I poured white vinegar in and flushed again. So far, no luck.
I can't get a snake through the bends. Any help out there? What might dissolve that clot of mold? With the pros charging $100. Just to appear, I dread calling a plumber.

It will dissipate. Just keep plunging away and flushing away.

Tell us you still have the conrainer and the lid. Fill up two buckets with very hot water, dump them into the toilet about 30 seconds apart.