No FKing kidding keke
Etymology of a swearword that involves an acronym. Shit cannot be blamed on cargoes of manure exploding in the middle of the Atlantic (Ship High in Transit), while the British word naff cannot be attributed to "not available for fucking." (Why naff needed an acronym is puzzling. It originated as a word in the 1960s gay slang language Polari–isn't that interesting enough?) The two great exceptions are snafu (situation normal: all fucked up) and fubar (fucked up beyond all recognition), which grew out of the military's RFA (rage for acronyms) in World War II.
Fuck isn't an Anglo-Saxon word either. Some of today's swearwords did indeed originate in Old English, including shit, arse, turd, and the British bollocks. The f-word is of Germanic origin, related to Dutch, German, and Swedish words for "to strike" and "to move back and forth." It first appears, though, only in the 16th century, in a manuscript of the Latin orator Cicero. An anonymous monk was reading through the monastery copy of De Officiis (a guide to moral conduct) when he felt compelled to express his anger at his abbot. "O d fuckin Abbot," he scrawled in the margin of the text. We can be sure when this was because he helpfully recorded the date in another comment–1528.