Fuck is an English word that, as a verb, literally means "to have sexual intercourse with," and figuratively means "to take unfair advantage of." It was at one time the most vulgar word in the English language, and its use would be considered déclassé in polite social circles. But the word has permeated the vocabulary of many social groups (such as lawyers, entertainers, and politicans) who would once have shunned it. Now it is often used simply to provide emphasis, as "very" or "really."

It is unclear whether the word has always been considered vulgar, and if not, when it first came to be used to describe (often in an extremely angry, hostile or belligerent manner) negative or unpleasant circumstances or people in an intentionally offensive way, such as in the term "motherfucker", one of its more common usages in North America.

Fuck is used not only as a verb (transitive and intransitive), but also as a noun, interjection, and, occasionally, as an expletive infix. The etymology of the word is uncertain (see below). Where the speaker feels that extreme emphasis is needed, it may be used several times in a sentence, e.g. "Fuck the fucking fuckers".

There are several urban-legend false etymologies postulating an acronymic origin for the word. None of these acronyms was ever heard before the 1960s, according to the authoritative lexicographical work, The F-Word, and thus are backronym. In any event, the word fuck has been in use far too long for some of these supposed origins to be possible. Some of these urban legends are:

* That the word fuck came from Irish law. If a couple were caught committing adultery, they would be punished "For Unlawful Carnal Knowledge In the Nude", with "FUCKIN" written on the stocks above them to denote the crime.

* That it came from any of:
o "Fornication Under Carnal/Cardinal Knowledge"
o "Fornication Under the Control/Consent/Command of the King"
o "Fornication Under the Christian King"
o "False Use of Carnal Knowledge"
o "Felonious Use of Carnal Knowledge"
o "Felonious Unlawful Carnal Knowledge"
o "Full-On Unlawful Carnal Knowledge"
o "For Unlawful Carnal Knowledge"
o "Found Under Carnal Knowledge"
o "Forced Unlawful Carnal Knowledge", referring to the crime of rape.
"Yit be his feiris he wald haue fukkit: / Ye brek my hairt, my bony ane" (ll. 13–14).
"Fuck, fucking fuckers fucked!"
by Shoshannarose March 18, 2008

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Derived from the old english acronymic phrase (F.U.C.K) Fornication Under Consent of the King
Oh look, that door has a fuck sign on it,they obviously have consent from our king to make a baby
by Firleigh rinse mincers December 16, 2008

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When a penis is injected into a pussy or anus and vigorous pounding occurs
Kiersten : Oh Jake! I just love when you sneak up behind me and kiss my neck!
Jake : Well you just wait till after work i'll be kissing more then just your neck!
Chad : Wow Kiersten I remember when I used to kiss your naked body and Fuck your soft pussy after work!
Kiersten : Wow Chad why don't you go home and Fuck your wife after work!
Chad : Uh Gross!
by SlopNChop July 05, 2017

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Word originally used during the crusades by the European Crusaders meaning:
Fornication
Under
Consent (of the)
King
Meaning they were permitted by their respective kings to bang during their travels to the holy land
Sir Dave: "Dude I railed that hot Arab chick in the bathroom last night, I'm cool though right?"
Sir Rick: "Yeah dude remember, FUCK"
by Jihad_Unit December 07, 2009

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everyone's favorite word.
a: what's your favorite word?
b: same as everyone else's!
a: ohh... you mean fuck!
by sexkitttteen September 07, 2008

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Fuck is a word for sex,slang,ect....
''what the fuck do you want.''

''holy fuck did you see that''

''i want you to fucking fuck me in my fuckin ass bitch''

''i want to fuck your mom.'' ''fuck yes''

''fuck who fuck me no fuck you... damn fucker fuck fuck fuck fuck fuck everyone bitch.''
by bmwilli April 03, 2006

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An abbreviated form of the angry (and over used) fuuuuuuuukkkkkkkkkkkkkkkk!!!!!!!!!!!!!!
Mac: We´re in Barcelona right now without you. We called your phone 10000 times and u wouldnt wake up. dumbass.

Mario: Fuck!
by McGoomba July 08, 2009

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