Refers to a conservative website or agency which has an official or technical-sounding name, but turns out to contain biased information.
The website will generally not advocate researching the topic for oneself, and contain many references to "liberals," "the liberal agenda," "liberal bias," and the like.
The articles on the website will usually speak against Democrats, progressive reformers and grassroots activists.
All these false rumors about health care? They're turning ordinary citizens into screaming angry mobs. This is obviously the work of some sinister un-think tank.