(vulgar, colloquial, intransitive) To have sexual intercourse, to copulate. / (vulgar, colloquial, transitive) To have sexual intercourse with.

(vulgar, colloquial) An act of sexual intercourse. / (vulgar, colloquial) A sexual partner, especially a casual one. / (vulgar, colloquial) A highly contemptible person.

(strongly vulgar) A semi-voluntary vocalization in place of a gasp. / (vulgar, colloquial) Expressing dismay or discontent. / (vulgar, colloquial) Expressing surprise.

(vulgar, colloquial) Used as an intensifier for the words "yes" and "no".

(vulgar, slang, especially African-American Vernacular) Used as a shortened form of various common interrogative phrases.

present participle of fuck

(vulgar) An act of sexual intercourse, especially one lacking passion or a feeling of sincere love. / (vulgar, figuratively) An act of mistreatment.

(vulgar) An intensifier, often applying more to the whole utterance than to the specific word it grammatically modifies. / (vulgar) Offensive, annoying or worthless.

(vulgar) Really, very; having intensive force, often applying to the whole sentence or clause.

(vulgar) Alternative spelling of -fucking-, used when the word inflix is put between two words