1 definition by englishmajor19

fornicating unlawful cardinal knowledge: its use came around in the early years of the French revolution. It was written on the walls of the Bastille, before the French bourgeoisie tore it down.

In today's culture, it can mean a variety of things, such as replacing other words when one is inarticulate, or often referring to its verb form, to have sex with someone. It can also be used as an adjective with negative or positive connotation.
Ex1: I just fucked a hot chick.

Ex2: Why the fuck did you throw away my wallet?

Ex3: That dude is fuckin scary.
by englishmajor19 September 13, 2010
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