When you shush somebody while placing your middle finger on your lips instead of the traditional index finger, indicating that they should not only silence themselves, but fuck off as well. Best used against someone in mid-sentence.
Guy1- "Are you completely retar..."
Guy2-(placing middle finger on lips)- "Shhhhh"
Guy3- "oh shit, he just gave you The Rude Librarian!"
by El Muchacho Grande January 25, 2012
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