The line that contains fuck reads Non sunt in coeli, quia gxddbov xxkxzt pg ifmk.
Some English-speaking countries censor it on television and radio.
Andrea Millwood Hargrave's 2000 study of the attitudes of the British public found that fuck was considered the third most severe profanity and its derivative motherfucker second. According to linguist Pamela Hobbs, "notwithstanding its increasing public use, enduring cultural models that inform our beliefs about the nature of sexuality and sexual acts preserve its status as a vile utterance that continues to inspire moral outrage." Hobbs considers users rather than usage of the word and sub-divides users into 'non-users', for whom the word "evokes the core sexual meanings and associated sexual imagery that motivate the taboo", and 'users' for whom "metaphorical uses of the word fuck no more evoke images of sexual intercourse than a ten-year-old’s ‘My mom’ll kill me if she finds out’ evokes images of murder," so that the "criteria of taboo are missing." Because of its increasing usage in the public forum, in 2005 the word was included for the first time as one of three vulgarities in The Canadian Press's Canadian Press Caps and Spelling guide.
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.In modern usage, the term fuck and its derivatives (such as fucker and fucking) can be used as a noun, a verb, an adjective, an interjection, or an adverb.There are many common phrases that employ the word, as well as compounds that incorporate it, such as motherfucker, fuckwit and fucknut.
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").