Clogged Arteries

I was showering today at the gym and the drain started to back up.
I pulled the drain up and there was a glob of something (hair, semen, soap, and poop?) a full six inches long hanging from the drain.

Then inside the drain pipe I could see that the circumference of the pipe had about 1/4" to 1/2"of the same grey-brown substance lining it. Like an artery clogged with cholesterol, the pipe was completely entrenched in this vile goop.

I immediately dropped the drain cover to the tile floor and went for my camera. When i leaned over to snap these photos the smell was overwhelming. I cannot quite describe it but I thought I was going to throw up. (i blame that nausea for the blurry picture.)