
A fan or fanatic, sometimes also termed an aficionado or enthusiast, is a person who exhibits strong interest or admiration for something or somebody, such as a celebrity or a sport or a sports team, a genre, a politician, a book, a movie, a video game or an entertainer. Collectively, the fans of a particular object or person constitute its fanbase or fandom. They may show their enthusiasm in a variety of ways, such as by promoting the object of their interest, being members of a related fan club, holding or participating in fan conventions or writing fan mail. They may also engage in creative activities such as creating fanzines, writing fan fiction, making memes or drawing fan art.

Cheering involves the uttering or making of sounds and may be used to encourage, excite to action, indicate approval or welcome.

The Green Bay Packers Fan Hall of Fame was the first hall of fame built to honor fans of a professional football team. It was established by the Green Bay Packers and the Green Bay Packers Hall of Fame in 1998. Fans may nominate themselves or others for inductions by submitting an essay of 500 words or less, accompanied by a photo or a two-minute video, explaining why they or another person are the ultimate Packers fan and deserve recognition. Ten finalists are chosen by a selection committee composed of members of the Packer Hall of Fame board and members of the Green Bay Packers' front office, and are profiled in the Milwaukee Journal Sentinel, as well as on the Packers' website. Fans are then given an opportunity to vote on the 10 finalists whose stories were profiled.

The Hogettes are a group of fans of the Washington Football Team who wore women's dresses, garden party hats, and pig snouts. The group was founded in 1983 by Michael Torbert and became a regular fixture at Redskins games for nearly 30 years. When the group announced its retirement following the 2012 season, it had over 20 members, including three who have been featured in an exhibit at the Pro Football Hall of Fame.

The Iglesia Maradoniana is a religion, created by fans of the late Argentine football player Diego Maradona, whom they believe to be the best player of all time.

A pancake breakfast is a public meal attached to many festivals, religious celebrations, and community events which involves volunteers cooking large quantities of pancakes and other hot breakfast foods for the general public, often for free or for a nominal charge if the event is a fundraiser.

Player escort (also called match mascot or child mascot is a child who accompanies football player entering the pitch. Player escorts hold hands with the footballer while they walk in and stay with the player during the playing of the national anthem. The children are usually between 6 and 18 years old. In addition to assisting players, they often have duties such as carrying flags, helping the sideline ball crew and playing matches with each other.

Tifo is the phenomenon whereby tifosi of a sports team makes a visual display of any choreographed flag, sign or banner in the stands of a stadium, mostly as part of an association football match.