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The line that contains fuck reads Non sunt in coeli, quia gxddbov xxkxzt pg ifmk.
Deciphering the phrase "gxddbou xxkxzt pg ifmk", here by replacing each letter by the previous letter in alphabetical order, as the English alphabet was then, yields the macaronic non sunt in coeli, quia fuccant vvivys of heli, which translated means, "They are not in heaven, because they fuck the women of Ely".
Otherwise, the usually accepted first known occurrence of the word is found in code in a poem in a mixture of Latin and English composed in the 15th century.
The poem, which satirizes the Carmelite friars of Cambridge, England, takes its title, "Flen flyys", from the first words of its opening line, Flen, flyys, and freris ("Fleas, flies, and friars").
A similar variant on this theory involves the recording by church clerks of the crime of "Forbidden Use of Carnal Knowledge." Another theory is that of a royal permission.
During the Black Death in the Middle Ages, towns were trying to control populations and their interactions.
Since uncontaminated resources were scarce, supposedly many towns required permission to have children.
However, the connection to futuere has been disputed—Anatoly Liberman calls it a "coincidence" and writes that it is not likely to have been borrowed from the Low German precursors to fuck.The word is considered obscene, but is common in many informal and familiar situations.It is unclear whether the word has always been considered vulgar, or, if not, when it first came to be used to describe (often in an extremely angry, hostile or belligerent manner) unpleasant circumstances or people in an intentionally offensive way, such as in the term motherfucker, one of its more common usages in some parts of the English-speaking world.which often refers to the act of sexual intercourse but is also commonly used as an intensifier or to denote disdain.Its origin is obscure but is usually considered to be first attested to around 1475, although it may be considerably older.
Some English-speaking countries censor it on television and radio.