1. tv. & in. to copulate [with] someone. (Taboo. Usually objectionable. It should be noted that English does not have a one-word, standard, transitive verb for this act. All expressions with the same meaning are phrases, slang, or colloquial. See the complete list of all entries with fuck in the Index of Hidden Key Words.) They want to fuck all night.
2. n. an act of copulation. (Taboo. Usually objectionable.) I need a fuck.
3. n. a person with whom one can copulate. (Taboo. Usually objectionable.) Man, he’s a good fuck if I ever saw one.
4. n. semen. (Taboo. Usually objectionable.) Clean up that fuck before somebody sees it!
5. exclam. an exclamation of anger or exasperation. (Usually (Oh,) fuck! Taboo. Usually objectionable.) Oh, fuck! I’m outa beer.