A sick "porn" movie (If this kind of movies are classified as porno...)
" 極悪非道なスカトロマニアの拷問リクエストに月咲舞が笑顔で挑戦します "
I don't know the English name for it but it is similar to "Semen Mania" series (with "Shit" in the movie instead of Semen)

http://www5.av-navi.co.jp/detail.php/id=589000904982/
http://www5.av-navi.co.jp/gallery.php/gallery=589000904982

The girl in movie eat (not ony chew, but swallow) 10+ man's shit. And they hang her upside down then drop her into a big box which filled with possible 100+ person's shit...

Just too sick to watch...