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if you find swearwords offensive!

• The word "fuck" did not originate in Christianized Anglo-Saxon England as an acronym for "Fornication Under Consent of King"; nor did it originate as an acronym for "For Unlawful Carnal Knowledge", either as a sign posted above adulterers in the stocks, or as a criminal charge against members of the British Armed Forces; nor did it originate during the 15th-century Battle of Agincourt as a corruption of "pluck yew" (an idiom falsely attributed to the English for drawing a longbow).^[72][73][74] Modern English was not spoken until the 16th century, and words such as "fornication" and "consent" did not exist in any form in English until the influence of Anglo-Norman in the late 12th century. The earliest recorded use of "fuck" in English comes from c. 1475, in the poem "Flen flyys", where it is spelled fuccant (conjugated as if a Latin verb meaning "they fuck"). It is of Proto-Germanic origin, and is related to Dutch fokken and Norwegian fukka.^[75][76][77]

• The word "crap" did not originate as a back-formation of British plumber Thomas Crapper's surname, nor does his name originate from the word "crap", although the surname may have helped popularize the word.^[78][79] The surname "Crapper" is a variant of "Cropper", which originally referred to someone who harvested crops.^[80][81] The word "crap" ultimately comes from Medieval Latin crappa, meaning "chaff".^[82]

• It is frequently rumored that the expression "rule of thumb", which is used to indicate a technique for generating a quick estimate, was originally coined from a law allowing a man to beat his wife with a stick, provided it was not thicker than the width of his thumb.^[83] In fact, the origin of this phrase remains uncertain, but the false etymology has been broadly reported in media including The Washington Post (1989), CNN (1993), and Time magazine (1983).^[84]

• "Golf" did not originate as an acronym of "Gentlemen Only, Ladies Forbidden".^[85] The word's true origin is unknown, but it existed in the Middle Scots period.^[86][87]

• The word "gringo" (a pejorative term for an American) did not originate during the Mexican-American War (1846–1848), the Venezuelan War of Independence (1811–1823), the Mexican Revolution (1910–1920), or in the American Old West (c. 1865–1899) as a corruption the lyrics "green grow" in either "Green Grow the Lilacs" or "Green Grow the Rushes, O" sung by American soldiers or cowboys;^[88] nor did it originate during any of these times as a corruption of "Green go home!", falsely said to have been shouted at green-clad American troops.^[89] The word originally simply meant "foreigner", and is probably a corruption of Spanish griego, "Greek".^[90]

• The phrase "sleep tight" did not originally refer to a supposed Medieval or early modern practice of tightening feather mattresses with ropes.^[91] The word "tight" here simply means "soundly".^[92]

• "420" did not originate as the Los Angeles police or penal code for marijuana use.^[93] Police Code 420 is "juvenile disturbance",^[94] and Penal Code 420 defines the prevention, hindrance, or obstruction of legal "entry, settlement, or residence" on "any tract of public land" as a misdemeanor.^[95] The use of "420" started in 1971 at San Rafael High School, where it indicated the time 4:20 PM, when a group of students would go smoke under the statue of Louis Pasteur.^[93] Some police codes that do relate to illegal drugs include 10–50 ("under influence of drugs"), 966 ("drug deal"), 11300 ("narcotics"), and 23105 ("driver under narcotics").^[96][97]

• Despite being commonly believed today, people during the Old and Middle English speaking periods never pronounced "the" as "ye".^[98] The confusion derives from the confusion with the thorn, which in old print (þ^e or y^e) often looked like a y.^[99][100]

• The claim that Frederick Remington, on assignment to Cuba, telegraphed William Randolph Hearst "...There will be no war. I wish to return" and Hearst responded, "Please remain. You furnish the pictures, and I'll furnish the war" is unsubstantiated. Although this claim is included in a book by James Creelman, there is no evidence that the telegraph exchange ever happened, and substantial evidence that it did not.^[101][102]