"Fuck" is an English word that is almost universally considered vulgar by its speakers. In its most literal meaning, it refers to the act of sexual intercourse. By extension it may be used to negatively characterize anything that can be dismissed, disdained, defiled, or destroyed and may also be used as an intensive.
"Fuck" can often be used as a verb, adverb, adjective, imperative, interjection, and noun. It has various metaphorical meanings. To be "fucked" can mean to be cheated (e.g., "I got fucked by a scam artist"), or to be broken or ruined (e.g., "my computer is fucked") as well as to be sexually penetrated. As a noun, "a fuck" or "a fucker" may describe a contemptible person. "A fuck" may mean an act of copulation. The word can be used as an interjection, and its participle is sometimes used as a strong (not necessarily negative) emphatic. The verb to fuck may be used transitively or intransitively, and it appears in compounds, including fuck off, fuck you, fuck up, and fuck with. In less explicit usages (but still regarded as vulgar), fuck or fuck with can mean to mess around, or to deal with unfairly or harshly. In a phrase such as "don't give a fuck", the word is the equivalent of "damn", in the sense of something having little value. In "what the fuck?!", it serves merely as an intensive. If something is very abnormal or annoying, "this is fucked up!" may be used.
