Turdium is a Chrome extension that lets you mark pages are turds because they are of low quality.
It's basically a downvote button for Chrome.
It's supposed to be the opposite of the applause on Medium.
When you install it, a random ID is generated. When you open a page the extension checks whether that ID has marked a page as a turd before and how many others have.
The extension can be installed from Github: https://github.com/regoje/turdium-chrome by cloning it and then loading an unpacked extension.