So that's why it wasn't draining...

>_> *shudders* This was nasty, just as much as it smelled. e~e; And since the screw wouldn't come off, being rusted, it's now broken cuz I was using the screwdriver to push it out of the way to get all this gunk. :/ Apparently this is my bathtub at my mom's house. And this isn't my first time doing this, but it's just to show how bad clogged drains can be.