A fan, or fanatic, sometimes also termed aficionado or supporter, is a person who is enthusiastically devoted to something or somebody, such as a singer or band, a sports team, a genre, a politician, a book, a movie or an entertainer.
Sport or sports are all usually forms of competitive physical activity or games which, through casual or organized participation, aim to use, maintain or improve physical ability and skills while providing enjoyment to participants, and in some cases, entertainment for spectators.
Genre is any category of literature, music, or other forms of art or entertainment, whether written or spoken, audio or visual, based on some set of stylistic criteria.
A politician is a person active in party politics, or a person holding or seeking office in government.
NFL Fan Interactions by Highlight Heaven
Collectively, the fans of a particular object or person constitute its fanbase or fandom.
Fandom is a subculture composed of fans characterized by a feeling of empathy and camaraderie with others who share a common interest.
Fan Interference in Sports Compilation by Savage Brick Sports
They may show their enthusiasm in a variety of ways, such as by promoting the object of their interest, being members of a fan club, holding or participating in fan conventions, or writing fan mail.
Fan convention, a term that antedates 1942, is an event in which fans of a particular film, television series, comic book, actor, or an entire genre of entertainment, such as science fiction or anime and manga, gather to participate and hold programs and other events, and to meet experts, famous personalities, and each other.
Fan mail is mail sent to a public figure, especially a celebrity, by their admirers or "fans".
A fan club is a group that is dedicated to celebrities group, or idea.
They may also engage in creative activities such as creating fanzines, writing fan fiction, making memes or drawing fan art.
A fanzine is a non-professional and non-official publication produced by enthusiasts of a particular cultural phenomenon for the pleasure of others who share their interest.
Fan fiction or fanfiction is fiction about characters or settings from an original work of fiction, created by fans of that work rather than by its creator.
Fan art is artwork created by fans of a work of fiction and derived from a series character or other aspect of that work.