Macho Librarians With Guns a special subset of the toungue in cheek role playing game Macho Women With Guns.
“These ladies might have gone on to be typical Macho Women were it not for one distinguishing attribute: Intelligence. Operating under the joint authority of the National Library Association and U.S. Special Operations Command, these gun-toting librarians lead a never ending fight to promote literacy, recover overdue materials, and oppose censorship.” [thanks daniel]