A fake etymology is an invented explanation (etymology) for the origin of a word. Many vulgar words in particular have been subject to such invented etymologies, most of which have very recent 20th century origins. Sometimes, these etymologies are then propagated through the culture by others, either because they were taken seriously by mistake, or simply because they enjoyed the joke and wanted to pass it along. In principle, fake etymologies, which are constructed in the knowledge that they are false, should be distinguished from folk etymologies, which are (presumably) coined in the mistaken belief that they are accurate. However, once either kind has gained currency, they are propagated in similar ways.
F.U.C.K (for Fuck). This fake etymology suggests that the term "fuck" originated as an acronym, standing for "For Unlawful Carnal Knowledge". According to this etymology, adulterers in medievalEngland would be charged with the crime of unlawful carnal knowledge. After a while the charge was shortened on the charge sheet to "F.U.C.K.", and so the term came to mean the act of adultery. There are a number of variations on this theme - the same acronym was posted on stocks where adulterers were publicly humiliated. Another variation suggests that F.U.C.K stands for "Fornication Under Consent of the King", supposedly posted on the doors of those permitted to reproduce at a time of medieval population control. Clearly such an explanation stands out as being especially bogus if one has the slightest grip on the reality of history.
Pommy, an Australian slang term for a person of British descent or origin. The true origins of the term remain obscure, but a common fake etymology suggests that the term arises from the acronym P.O.M.E, for "Prisoner of Mother England", which term was supposedly used on documentation accompanying English convicts transported to Australia.
S.H.I.T (for shit). This fake etymology suggests that the origin of the term "shit" traces back to the farmingindustry. Dried manure was transported via ship. Often times it would be stored in the lowest holds of the ship, the remoteness of these sections was ideal for concealing the smell. The wooden boats were prone to minor leakage. The manure would become damp and begin expelling methane. On occasion this methane buildup was set into an explosive charge by deck hands going into the holds with lit lanterns. Once it had finally been figured out what caused the accidents all manure packages going an board were required to be labled "Store High In Transit" which was later abbreviated to S.H.I.T.
