Fuck isn't an anagram, that is an urban legend. Fuck is an archaic Viking word.
Idiot!
http://www.wordorigins.org/Fuck
Popular etymologies agree, unfortunately incorrectly, that this is an acronym meaning either Fornication Under Consent of the King or For Unlawful Carnal Knowledge, the latter usually accompanying a story about how medieval prisoners were forced to wear this word on their clothing.
Deriving the etymology of this word is difficult, as it has been under a taboo for most of its existence and citations are rare. The earliest known use, according to American Heritage and Lighter, predates 1500 and is from a poem written in a mix of Latin and English and entitled Flen flyys. The relevant line reads:
Non sunt in celi quia fuccant uuiuys of heli.
Translated:
They
are not in heaven because they fuck the wives of Ely .
Fuccant is a pseudo-Latin word and in the original it is written in cipher to further disguise it.
Some sources cite an alleged use from 1278 as a personal name, John le Fucker, but this citation is questionable. No one has properly identified the document this name supposedly appears in and even if it is real, the name is likely a variant of fuker, a maker of cloth, fulcher, a soldier, or another similar word.
The earliest usage cite in the OED2 dates from 1503 and is in the form fukkit. The earliest cite of the current spelling is from 1535.
While these cognates exist, they are probably not the source of fuck, rather all these words probably come from a common root. Most of the early known usages of the English word come from Scotland, leading some scholars to believe that the word comes from Scandinavian sources. Others disagree, believing that the number of northern citations reflects that the taboo was weaker in Scotland and the north, resulting in more surviving usages. The fact that there are citations, albeit fewer of them, from southern England dating from the same period seems to bear out this latter theory.
<\i>